For the deepest water when rounding a bend in a river, you should navigate your vessel____.A.toward the inside of the bendB.toward the outside of the bendC.toward the center of the river just before the bend, then change course for the river’s venter afte

根据下面资料，回答
Germs are everywhere. You can′t see them, but they are on your desk, on your computer, and even in the air!
Like people, germs move around the world. They fly with us on planes. When food, clothes, and other things travel around the world, germs travel, too. Some germs are safe, but some are dangerous. Germs cause illnesses like colds and the flu.
Warmer Weather Brings Germs
The world′s weather is changing. Cooler countries are getting warmer, so insects from hot countries can move there. Some of these insects, like mosquitoes, carry dangerous germs. These germs cause headaches, fever, and can even kill people.
Under Your Skin
Your skin protects you from germs. It stops some germs, but not all. They can enter your body when you eat, or when you have a cut. Germs are on your hands, too. They enter your body when you touch your eyes, nose, or mouth.
Your immune system (免疫系统) protects you, too. When germs get inside your body, your immune system finds and kills them. Special cells (细胞) move around your body and fight germs. They help you stay healthy. Other cells make antibodies. Antibodies help your body find and stop germs.
What can you do to fight germs? You should wash your hands with soap and water. Soap kills many germs, and water washes them away.
What do antibodies do?
_______________________________________________________________________

共用题干
The Drink Your Body Needs Most

I Our bodies are estimated to be about 60% to 70% water. Blood is mostly water,and
our muscles,lungs,and brain all contain a lot of water. Water is needed to regulate body
temperature and to provide the means for nutrients（滋养物）to travel to all our organs.
Water also transports oxygen to our cells,removes waste,and protects our joints and
organs.
2 We lose water through urination（排尿）,respiration（呼吸）,and by sweating. If you
are very active,you lose more water than if you do not take much exercise.Symptoms of
mild dehydration（脱水）include chronic pains in joints and muscles, lower back pain,
headaches, and constipation（便秘）.A strong smell to your urine, along with a yellow
color indicates that you are not getting enough water. Thirst is an obvious sign of
dehydration and in fact,you need water long before you feel thirsty.
3 A good rule of thumb（好的做法）is to take your bod犷weight in pounds and divide that
number in half. That gives you the number of ounces（盎司）of water per day that you
need.For example,if you weigh 160 pounds,you should drink at least 80 ounces of water
per day.If you exercise you should drink another 8-ounce glass of water for every 20
minutes you are active.If you drink coffee or alcohol,you should add at least an equal
amount of water. When you are traveling on an airplane,it is good to have 8 ounces of
water for every hour you are on board the plane.
4 It may be difficult to drink enough water on a busy day.Be sure you have water handy at
all times by keeping a bottle for water with you when you are working,traveling,or
exercising.If you get bored with plain water,add a bit of lemon for a touch of flavor.There
are some brands of flavored water available,but some of them have sugar or artificial
sweeteners that you don't need.

Paragraph 4__________
A:Ounces of water needed per day
B:Importance of water
C:Composition of water
D:Signs of dehydration
E:Supply of water
F:Necessity for bringing a bottle for water with you

共用题干
The Drink Your Body Needs Most

I Our bodies are estimated to be about 60% to 70% water. Blood is mostly water,and
our muscles,lungs,and brain all contain a lot of water. Water is needed to regulate body
temperature and to provide the means for nutrients（滋养物）to travel to all our organs.
Water also transports oxygen to our cells,removes waste,and protects our joints and
organs.
2 We lose water through urination（排尿）,respiration（呼吸）,and by sweating. If you
are very active,you lose more water than if you do not take much exercise.Symptoms of
mild dehydration（脱水）include chronic pains in joints and muscles, lower back pain,
headaches, and constipation（便秘）.A strong smell to your urine, along with a yellow
color indicates that you are not getting enough water. Thirst is an obvious sign of
dehydration and in fact,you need water long before you feel thirsty.
3 A good rule of thumb（好的做法）is to take your bod犷weight in pounds and divide that
number in half. That gives you the number of ounces（盎司）of water per day that you
need.For example,if you weigh 160 pounds,you should drink at least 80 ounces of water
per day.If you exercise you should drink another 8-ounce glass of water for every 20
minutes you are active.If you drink coffee or alcohol,you should add at least an equal
amount of water. When you are traveling on an airplane,it is good to have 8 ounces of
water for every hour you are on board the plane.
4 It may be difficult to drink enough water on a busy day.Be sure you have water handy at
all times by keeping a bottle for water with you when you are working,traveling,or
exercising.If you get bored with plain water,add a bit of lemon for a touch of flavor.There
are some brands of flavored water available,but some of them have sugar or artificial
sweeteners that you don't need.

One cannot live________
A:in your body
B:without water
C:before long
D:for a change
E:on a busy day
F:to your weight

共用题干
The Drink Your Body Needs Most

1 Our bodies are estimated to be about 60% to 70% water.Blood is mostly water,and
our muscles,lungs,and brain all contain a lot of water.Water is needed to regulate body
temperature and to provide the means for nutrients（滋养物）to travel to all our organs.
Water also transports oxygen to our cells,removes waste,and protects our joints and
organs.
2 We lose water through urination（排尿）,respiration（呼吸）,and by sweating. If you
are very active,you lose more water than if you do not take much exercise.Symptoms of
mild dehydration（脱水）include chronic pains in joints and muscles , lower back pain,
headaches, and constipation（便秘）.A strong smell to your urine , along with a yellow
color indicates that you are not getting enough water.Thirst is an obvious sign of
dehydration and in fact,you need water long before you feel thirsty.
3 A good rule of thumb（好的做法）is to take your body weight in pounds and divide that
number in half. That gives you the number of ounces（盎司）of water per day that you
need.For example,if you weigh 160 pounds,you should drink at least 80 ounces of water
per day.If you exercise you should drink another 8-ounce glass of water for every 20 minutes you are active.If you drink coffee or alcohol,you should add at least an equal
amount of water.When you are traveling on an airpiane,it is good to have 8 ounces of
water for every hour you are on board the plane.
4 It may be difficult to drink enough water on a busy day.Be sure you have water handy at
all times by keeping a bottle for water with you when you are working,traveling,or
exercising.If you get bored with plain water,add a bit of lemon for a touch of flavor.There
are some brands of flavored water available,but some of them have sugar or artificial
sweeteners that you don't need.

One cannot live_______.
A:in your body
B:without water
C:before long
D:for a change
E:on a busy day
F:to your weight

共用题干
The Drink Your Body Needs Most

1 Our bodies are estimated to be about 60% to 70% water.Blood is mostly water,and
our muscles,lungs,and brain all contain a lot of water.Water is needed to regulate body
temperature and to provide the means for nutrients（滋养物）to travel to all our organs.
Water also transports oxygen to our cells,removes waste,and protects our joints and
organs.
2 We lose water through urination（排尿）,respiration（呼吸）,and by sweating. If you
are very active,you lose more water than if you do not take much exercise.Symptoms of
mild dehydration（脱水）include chronic pains in joints and muscles , lower back pain,
headaches, and constipation（便秘）.A strong smell to your urine , along with a yellow
color indicates that you are not getting enough water.Thirst is an obvious sign of
dehydration and in fact,you need water long before you feel thirsty.
3 A good rule of thumb（好的做法）is to take your body weight in pounds and divide that
number in half. That gives you the number of ounces（盎司）of water per day that you
need.For example,if you weigh 160 pounds,you should drink at least 80 ounces of water
per day.If you exercise you should drink another 8-ounce glass of water for every 20 minutes you are active.If you drink coffee or alcohol,you should add at least an equal
amount of water.When you are traveling on an airpiane,it is good to have 8 ounces of
water for every hour you are on board the plane.
4 It may be difficult to drink enough water on a busy day.Be sure you have water handy at
all times by keeping a bottle for water with you when you are working,traveling,or
exercising.If you get bored with plain water,add a bit of lemon for a touch of flavor.There
are some brands of flavored water available,but some of them have sugar or artificial
sweeteners that you don't need.

Paragraph 3________
A:Ounces of water needed per day
B:Importance of water
C:Composition of water
D:Signs of dehydration
E:Supply of water
F:Necessity for bringing a bottle for water with you

共用题干
The Drink Your Body Needs Most
1. Our bodies are estimated to be about 60%to 70%water. Blood is mostly water, and our mus- dles,lungs and brain all contain a lot of water. Water is needed to regulate body temperature and to provide the means for nutrients（滋养物）to travel to all our organs. Water also transports oxy-gen to our cells,removes waste,and protects our joints and organs.
2. We lose water through urination（排尿）, respiration（呼吸）, and by sweating. If you are very active,you lose more water than if you do not take much exercise.Symptoms of mild dehydration （脱水）include chronic pains in joints and muscles,lower back pain,headaches,and constipation
（便秘）.A strong smell to your urine,along with a yellow color indicates that you are not getting enough water. Thirst is an obvious sign of dehydration and in fact,you need water long before you feel thirsty.
3 .A good rule of thumb（好的做法）is to take your body weight in pounds and divide that num- her in half. That gives you the number of ounces（盎司）of water per day that you need.For ex-ample,if you weigh 160 pounds,you should drink at least 80 ounces of water per day.If you ex- ercise you should drink another 8-ounce glass of water for every 20 minutes you are active.If you drink coffee or alcohol,you should add at least an equal amount of water. When you are traveling on an airplane,it is good to have 8 ounces of water for every hour you are on board the plane.
4 .It may be difficult to drink enough water on a busy day.Be sure you have water handy at all times by keeping a bottle for water with you when you are working,traveling,or exercising. If you get bored with plain water,add a bit of lemon for a touch of flavor. There are some brands of fla-vored water available,but some of them have sugar or artificial sweeteners that you don't need.

One cannot live________.
A: in your body
B: without water
C: before long
D: for a change
E: on a busy day
F: to your weight

共用题干
Some doctors think that you should drink a glass of water each morning. You should drink water before doing anything else.The temperature of the water should be similar to body temperature:not hot,not cold.Why should you drink this water?______(46).It helps clean out your kidneys.It prepares your stomach for digestion.______(47).After drinking water,the intestines can more easily take out nutrients from our food. And water helps us go to the bathroom more easily.
Scientists suggest that people take in 1,600 milliliters of water each day.______(48).If you do,your kidneys will have to work much harder to eliminate it. It's better to drink some in morning and some in afternoon.______(49).And during meals,they think water dilutes the juices produced in our stomachs.This can interfere with normal digestion.
Are you drinking enough water every day?Check the color of your urine.______(50).if your urine is very dark yellow,your probably need to drink more water. A little water each day could make you much healthier.

_________（47）
A:If it is light yellow,you are probably drinking enough
B:Water can also help your intestines work better
C:Some people think it's better to drink between meals
D:Water helps your body in many ways
E:But don't drink all of that water in one sitting
F: Water is an essential element of life

共用题干
The Drink Your Body Needs Most

I Our bodies are estimated to be about 60% to 70% water. Blood is mostly water,and
our muscles,lungs,and brain all contain a lot of water. Water is needed to regulate body
temperature and to provide the means for nutrients（滋养物）to travel to all our organs.
Water also transports oxygen to our cells,removes waste,and protects our joints and
organs.
2 We lose water through urination（排尿）,respiration（呼吸）,and by sweating. If you
are very active,you lose more water than if you do not take much exercise.Symptoms of
mild dehydration（脱水）include chronic pains in joints and muscles, lower back pain,
headaches, and constipation（便秘）.A strong smell to your urine, along with a yellow
color indicates that you are not getting enough water. Thirst is an obvious sign of
dehydration and in fact,you need water long before you feel thirsty.
3 A good rule of thumb（好的做法）is to take your bod犷weight in pounds and divide that
number in half. That gives you the number of ounces（盎司）of water per day that you
need.For example,if you weigh 160 pounds,you should drink at least 80 ounces of water
per day.If you exercise you should drink another 8-ounce glass of water for every 20
minutes you are active.If you drink coffee or alcohol,you should add at least an equal
amount of water. When you are traveling on an airplane,it is good to have 8 ounces of
water for every hour you are on board the plane.
4 It may be difficult to drink enough water on a busy day.Be sure you have water handy at
all times by keeping a bottle for water with you when you are working,traveling,or
exercising.If you get bored with plain water,add a bit of lemon for a touch of flavor.There
are some brands of flavored water available,but some of them have sugar or artificial
sweeteners that you don't need.

The amount of water your body needs per day is closely related________.
A:in your body
B:without water
C:before long
D:for a change
E:on a busy day
F:to your weight

共用题干
The Drink Your Body Needs Most

I Our bodies are estimated to be about 60% to 70% water. Blood is mostly water,and
our muscles,lungs,and brain all contain a lot of water. Water is needed to regulate body
temperature and to provide the means for nutrients（滋养物）to travel to all our organs.
Water also transports oxygen to our cells,removes waste,and protects our joints and
organs.
2 We lose water through urination（排尿）,respiration（呼吸）,and by sweating. If you
are very active,you lose more water than if you do not take much exercise.Symptoms of
mild dehydration（脱水）include chronic pains in joints and muscles, lower back pain,
headaches, and constipation（便秘）.A strong smell to your urine, along with a yellow
color indicates that you are not getting enough water. Thirst is an obvious sign of
dehydration and in fact,you need water long before you feel thirsty.
3 A good rule of thumb（好的做法）is to take your bod犷weight in pounds and divide that
number in half. That gives you the number of ounces（盎司）of water per day that you
need.For example,if you weigh 160 pounds,you should drink at least 80 ounces of water
per day.If you exercise you should drink another 8-ounce glass of water for every 20
minutes you are active.If you drink coffee or alcohol,you should add at least an equal
amount of water. When you are traveling on an airplane,it is good to have 8 ounces of
water for every hour you are on board the plane.
4 It may be difficult to drink enough water on a busy day.Be sure you have water handy at
all times by keeping a bottle for water with you when you are working,traveling,or
exercising.If you get bored with plain water,add a bit of lemon for a touch of flavor.There
are some brands of flavored water available,but some of them have sugar or artificial
sweeteners that you don't need.

Dehydration may occur if there is a shortage of water_________.
A:in your body
B:without water
C:before long
D:for a change
E:on a busy day
F:to your weight

共用题干
The Drink Your Body Needs Most
1. Our bodies are estimated to be about 60%to 70%water. Blood is mostly water, and our mus- dles,lungs and brain all contain a lot of water. Water is needed to regulate body temperature and to provide the means for nutrients（滋养物）to travel to all our organs. Water also transports oxy-gen to our cells,removes waste,and protects our joints and organs.
2. We lose water through urination（排尿）, respiration（呼吸）, and by sweating. If you are very active,you lose more water than if you do not take much exercise.Symptoms of mild dehydration （脱水）include chronic pains in joints and muscles,lower back pain,headaches,and constipation
（便秘）.A strong smell to your urine,along with a yellow color indicates that you are not getting enough water. Thirst is an obvious sign of dehydration and in fact,you need water long before you feel thirsty.
3 .A good rule of thumb（好的做法）is to take your body weight in pounds and divide that num- her in half. That gives you the number of ounces（盎司）of water per day that you need.For ex-ample,if you weigh 160 pounds,you should drink at least 80 ounces of water per day.If you ex- ercise you should drink another 8-ounce glass of water for every 20 minutes you are active.If you drink coffee or alcohol,you should add at least an equal amount of water. When you are traveling on an airplane,it is good to have 8 ounces of water for every hour you are on board the plane.
4 .It may be difficult to drink enough water on a busy day.Be sure you have water handy at all times by keeping a bottle for water with you when you are working,traveling,or exercising. If you get bored with plain water,add a bit of lemon for a touch of flavor. There are some brands of fla-vored water available,but some of them have sugar or artificial sweeteners that you don't need.

The amount of water your body needs per day is related_________.
A: in your body
B: without water
C: before long
D: for a change
E: on a busy day
F: to your weight

共用题干
The Drink Your Body Needs Most
1. Our bodies are estimated to be about 60%to 70%water. Blood is mostly water, and our mus- dles,lungs and brain all contain a lot of water. Water is needed to regulate body temperature and to provide the means for nutrients（滋养物）to travel to all our organs. Water also transports oxy-gen to our cells,removes waste,and protects our joints and organs.
2. We lose water through urination（排尿）, respiration（呼吸）, and by sweating. If you are very active,you lose more water than if you do not take much exercise.Symptoms of mild dehydration （脱水）include chronic pains in joints and muscles,lower back pain,headaches,and constipation
（便秘）.A strong smell to your urine,along with a yellow color indicates that you are not getting enough water. Thirst is an obvious sign of dehydration and in fact,you need water long before you feel thirsty.
3 .A good rule of thumb（好的做法）is to take your body weight in pounds and divide that num- her in half. That gives you the number of ounces（盎司）of water per day that you need.For ex-ample,if you weigh 160 pounds,you should drink at least 80 ounces of water per day.If you ex- ercise you should drink another 8-ounce glass of water for every 20 minutes you are active.If you drink coffee or alcohol,you should add at least an equal amount of water. When you are traveling on an airplane,it is good to have 8 ounces of water for every hour you are on board the plane.
4 .It may be difficult to drink enough water on a busy day.Be sure you have water handy at all times by keeping a bottle for water with you when you are working,traveling,or exercising. If you get bored with plain water,add a bit of lemon for a touch of flavor. There are some brands of fla-vored water available,but some of them have sugar or artificial sweeteners that you don't need.

Paragraph 1________
A: Ounces of water needed per day
B:.Importance of water
C: Composition of water
D: Signs of dehydration
E: Supply of water
F: Necessity for bringing a bottle for water

共用题干
The Drink Your Body Needs Most
1. Our bodies are estimated to be about 60%to 70%water. Blood is mostly water, and our mus- dles,lungs and brain all contain a lot of water. Water is needed to regulate body temperature and to provide the means for nutrients（滋养物）to travel to all our organs. Water also transports oxy-gen to our cells,removes waste,and protects our joints and organs.
2. We lose water through urination（排尿）, respiration（呼吸）, and by sweating. If you are very active,you lose more water than if you do not take much exercise.Symptoms of mild dehydration （脱水）include chronic pains in joints and muscles,lower back pain,headaches,and constipation
（便秘）.A strong smell to your urine,along with a yellow color indicates that you are not getting enough water. Thirst is an obvious sign of dehydration and in fact,you need water long before you feel thirsty.
3 .A good rule of thumb（好的做法）is to take your body weight in pounds and divide that num- her in half. That gives you the number of ounces（盎司）of water per day that you need.For ex-ample,if you weigh 160 pounds,you should drink at least 80 ounces of water per day.If you ex- ercise you should drink another 8-ounce glass of water for every 20 minutes you are active.If you drink coffee or alcohol,you should add at least an equal amount of water. When you are traveling on an airplane,it is good to have 8 ounces of water for every hour you are on board the plane.
4 .It may be difficult to drink enough water on a busy day.Be sure you have water handy at all times by keeping a bottle for water with you when you are working,traveling,or exercising. If you get bored with plain water,add a bit of lemon for a touch of flavor. There are some brands of fla-vored water available,but some of them have sugar or artificial sweeteners that you don't need.

Dehydration may occur if there is a shortage of water_________.
A: in your body
B: without water
C: before long
D: for a change
E: on a busy day
F: to your weight