slowed down
retained
propelled
fed
第1题:
Running an electric winch at slow speed over a long period of time causes ______.
A.the speed to be retarded by the friction brake
B.a load to go downward at full speed
C.the circuit breaker to turn off
D.the resistors to overheat and eventually burn out
第2题:
第3题:
第4题:
In autumn, the()fall down from the trees.
Aleaf
Bleafs
Cleaves
第5题:
我们的重吊杆已经长时间不用了。()
第6题:
Economic growth slowed down in Europe and Japan.
There was less investment in industrialized countries.
Emerging markets received little surplus funds from developed economies.
The rate of return on investments turned out to be low.
第7题:
will be speeded up
should be slowed down
must slow down
have to be slow down
第8题:
He’s afraid to be cut down someday
He has fewer and fewer friends
The trees have the longest lives in the world
He has lived for thousands of years
第9题:
New trees are not looked after properly.
Many trees have been cut down by man.
Man has not paid enough attention to planting trees.
All of the above.
第10题:
financially
ahead
advantageously
progressively
第11题:
第12题:
turn to
confirm to
contribute to
respond to
第13题:
第14题:
第15题:
第16题:
In autumn, the()fall down from the trees.
第17题:
leaf
leafs
leaves
第18题:
the speed to be retarded by the friction brake
a load to go downward at full speed
the circuit breaker to turn off
the resistors to overheat and eventually burn out
第19题:
第20题:
It affects the growth of trees.
It has been increasing since the Ice Age.
It is determined by the chemicals in the air.
It follows a certain cycle.
第21题:
Both towheads will tend to drift apart,and the overtaking vessel will be slowed down
Both towheads will tend to drift together,and the overtaking vessel will be slowed down
Both towheads will tend to drift apart,and the overtaken vessel will be slowed down
Both towheads will tend to drift together,and the overtaken vessel will be slowed down
第22题:
Our derrick has been out of use for a long time.
Our heavy derrick has been out of use for a long time.
Our crane has been out of use for a long time.
Our winch has been out of use for a long time.
第23题:
Because nothing remains on land except floods.
Because there are no longer trees to keep the rain and protect the top-soil.
Because too much rain sinks in and washes away the top-soil.
Because roots of the trees break up the soil.