66、在鱼洗实验中,下列哪个说法是正确的? In the fish washing experiment, which of the following statements is true?A.当鱼洗器壁的振动频率越来越接近于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is closer and closer to the natural f

题目

66、在鱼洗实验中,下列哪个说法是正确的? In the fish washing experiment, which of the following statements is true?

A.当鱼洗器壁的振动频率越来越接近于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is closer and closer to the natural frequency of the fish washer;###SXB###B.当鱼洗器壁的振动频率大于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is greater than the natural frequency of the fish washer;###SXB###C.当鱼洗器壁的振动频率小于鱼洗固有频率时,产生共振现象; When the vibration frequency of the fish

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更多“66、在鱼洗实验中,下列哪个说法是正确的? In the fish washing experiment, which of the following statements is true?”相关问题
  • 第1题:

    Which of the following statements are true of collectivist culture?

    A、Disclosure of private feeling is distasteful.

    B、People are suspicious of outsiders.

    C、Uniformity is not highly thought of.

    D、there is a positive attitude about words of disagreement.


    参考答案:B

  • 第2题:

    Which of following statements about testing software with data is (are) true?

    Ⅰ.The primary purpose of such testing is to find errors.

    Ⅱ.Such testing can demonstrate the existence of errors but can not demonstrate the absence of errors.

    A.Neither

    B.Ⅰ only

    C.Ⅱ only

    D.Ⅰ and Ⅱ


    正确答案:B

  • 第3题:

    Which of the following statements about language is NOT true?

    A.Language is a system
    B.Language is symbol
    C.Animals also have language
    D.Language is arbitrary

    答案:C
    解析:
    本题考查语言的定义。
    本题要求选不正确的,C选项,动物也有语言,错误。语言是人类在交际中使用的一套任意的声音符号系统。动物没有语言,动物只是本能发出声音。综上,应选C。
    A选项,系统的,故排除。
    B选项,符号,故排除。
    D选项,任意的,故排除。
    故正确答案为C项。

  • 第4题:

    鱼铲的英文是()。

    • A、Fish Knife
    • B、Fish Slicer
    • C、Fish Pan
    • D、Fish dressing

    正确答案:B

  • 第5题:

    Which of the following statements is true regarding the VERSIONS BETWEEN clause?()  

    • A、 The VERSIONS BETWEEN clause may be used in DML statements.
    • B、 The VERSIONS BETWEEN clause may be used in DDL statements.
    • C、 The VERSIONS BETWEEN clause may not be used to query past DDL changes to tables.
    • D、 The VERSIONS BETWEEN clause may not be used to query past DML statements to tables.

    正确答案:C

  • 第6题:

    Which of the following statements are true?() 

    • A、 The equals() method determines if reference values refer to the same object.
    • B、 The == operator determines if the contents and type of two separate objects match.
    • C、 The equals() method returns true only when the contents of two objects match.
    • D、 The class File overrides equals() to return true if the contents and type of two separate objects        match.

    正确答案:A,D

  • 第7题:

    多选题
    If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)
    A

    p + q is even

    B

    pq is odd

    C

    p2-q2 is even


    正确答案: A,B
    解析:
    由于所有大于2的质数都是奇数,因此p和q均是奇数,两奇数相加为偶数,所以A项正确;两奇数的乘积还是奇数,所以B项正确;两奇数的平方还各自是奇数,而两奇数的平方之差是偶数,因此C项也正确;所以选择A、B、C三项。

  • 第8题:

    单选题
    Which of the following statements is NOT true?()
    A

    The open field system provided a good opportunity to experiment.

    B

    The open field system wasted land.

    C

    The open field system was wasteful of labor and time.

    D

    The open field system made livestock farming difficult.


    正确答案: C
    解析: 暂无解析

  • 第9题:

    单选题
    Which of the following statements about the golf club is NOT true?
    A

    It’s at the top of the cliff.

    B

    They were not allowed to be in the club.

    C

    They parked the car near the club.


    正确答案: A
    解析:
    根据there was a golf club at the top of the cliff that we weren’t allowed into可见A项和B项说法正确。文中只提到停放汽车,但没有提及停在哪儿。

  • 第10题:

    单选题
    Which of the following statements is true according to the news?
    A

    In Vietnam there are three people died of suspected bird flu.

    B

    The virus has spread across the entire Thailand.

    C

    The health workers in Thailand conducted stringent surveillance measures.


    正确答案: C
    解析: 新闻结尾提到,泰国邻国防疫人员正加紧监测防范措施,所以C项正确。
    【录音原文】
      One man died of suspected bird flu in Vietnam over the weekend and three people were hospitalized as news reports showed the virus has spread across the entire country. In neighboring Thailand, health workers have been put on alert and ordered to conduct stringent surveillance measures but it is Vietnam that has emerged as the epicenter for the deadly H5N1 virus.

  • 第11题:

    多选题
    Which of the following statements are true? ()
    A

    RC4 is a stream cipher

    B

    Stream ciphers require padding

    C

    AES is a block cipher

    D

    DES and 3DES are stream ciphers

    E

    AES is a stream cipher

    F

    AES, DES, and 3DES can be used as HMAC algorithms


    正确答案: D,B
    解析: 暂无解析

  • 第12题:

    单选题
    Which of the following statements is true regarding the VERSIONS BETWEEN clause?()
    A

     The VERSIONS BETWEEN clause may be used in DML statements.

    B

     The VERSIONS BETWEEN clause may be used in DDL statements.

    C

     The VERSIONS BETWEEN clause may not be used to query past DDL changes to tables.

    D

     The VERSIONS BETWEEN clause may not be used to query past DML statements to tables.


    正确答案: A
    解析: 暂无解析

  • 第13题:

    Which of the following statements is true? Accounts payable are ______.

    A.debts owed to suppliers

    B.related to purchases of goods on an open account

    C.current liabilities

    D.all of the above


    正确答案:D
    解析:文章第三段提到Accounts payable are debts...on an open account.本题是关于应付账款的表述,应付账款是企业欠供应商的债务,是由于购买商品时进行赊销而形成的应付账款,应付账款属于短期流动债务。

  • 第14题:

    Which of the following statements can best be inferred from the passage?

    A. Fishes only "speak" to communicate with each other.

    B. Researches are now being made to study the significance of fish sounds.

    C. Sea animals have a sharper hearing ability than men.

    D. Sounds made by fish cannot be transmitted through the air.


    正确答案:B
    答案为 B。根据第一段第二至第五句, Actually, their talk may be as meaningful as much of our own.For example,some sea animals use their  "voices" to locate their food in the ocean expanses;others use their "voices" to let their fellows know of their locations;and still others,as a means of obtaining mates.Sometimes, "speaking" may even mean the difference between life and death to a sea animal.It appears in some cases that when a predator approaches,the prey depends on no more than the sounds it makes to escape 作出该项选择。选项 A中only不确切;选择 C和D在文中都没提到。

  • 第15题:

    Which of the following statements is NOT true?()

    AThe open field system provided a good opportunity to experiment.

    BThe open field system wasted land.

    CThe open field system was wasteful of labor and time.

    DThe open field system made livestock farming difficult.


    A

  • 第16题:

    Which of the following statements is NOT true?()

    • A、The open field system provided a good opportunity to experiment.
    • B、The open field system wasted land.
    • C、The open field system was wasteful of labor and time.
    • D、The open field system made livestock farming difficult.

    正确答案:A

  • 第17题:

    Which ONE of the following statements about Domino Enterprise server is true?()

    • A、Can host Active Server Pages Web sites
    • B、Can host PHP Web sites
    • C、Includes a DB2 server
    • D、Includes an integrated Web application server

    正确答案:D

  • 第18题:

    Which of the following statements are true regarding the Recycle Bin?()

    • A、 The Recycle Bin is a physical storage area for dropped objects.
    • B、 The Recycle Bin is a logical container for dropped objects.
    • C、 The Recycle Bin stores the results of a Flashback Drop operation.
    • D、 The objects in the Recycle Bin are stored in the tablespace in which they were created.

    正确答案:B,D

  • 第19题:

    多选题
    Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
    A

    c=d

    B

    l and k are parallel

    C

    m and l are perpendicular


    正确答案: C,B
    解析:
    根据题目中的已知信息无法推断出各直线的关系,因此B、C均不正确;而由图示可知,c和d分别是a和b的补角,由于a=b,所以c=d,A项正确。

  • 第20题:

    多选题
    Which of the following statements are true? (Indicate all such statements.)
    A

    τ(5) =τ(7)

    B

    τ(5) τ(7) =τ(35)

    C

    τ(5) + τ(7) =τ(12)


    正确答案: A,B
    解析:
    5和7均只有两个正除数,因此根据题干信息,A项正确;35有四个正除数,所以B项也是正确的;12有6个正除数,因此C项错误;选择A、B两项。

  • 第21题:

    单选题
    Which of the following statements is true according to the passage?
    A

    Earthquake destruction is declining.

    B

    Earthquake forecast is improving.

    C

    Man is no longer fearful of earthquakes.

    D

    Man is capable of conquering earthquakes.


    正确答案: A
    解析:
    A说地震造成的破坏在降低,与第一段的叙述相否;C说人们对地震不再感到恐惧,与最后一段的叙述相否;D说人们已经有能力征服地震,文章第三段第二句只说科学家对地震发生的时间和地点预测越来越准确,全文中也没提过人们可以征服地震。故B项“地震预测得到改进”正确。

  • 第22题:

    单选题
    Which of the following statements is NOT true according to the passage?
    A

    New England winters are cold.

    B

    Some taxi drivers are impolite.

    C

    The U. S. A is a popular place for tourists.

    D

    Hotel staff are often sympathetic.


    正确答案: A
    解析:
    结论推断题。答案出处为全文。A和B两项可以分别在原文的第三、四段找到。C项在原文中虽不能直接找到,但原文开头提到more than a million and a half foreign tourists就可以证明美国深受游客欢迎。D项与第四段中的unsympathetic相反,故选D项。

  • 第23题:

    单选题
    Which of the following statements is true?
    A

    Scientists have solved the mystery about the fish killer.

    B

    More studies need to be made about the fish killer.

    C

    It is proved that the algae are reducing fish populations.

    D

    Humans have already been affected by the toxin.


    正确答案: C
    解析:
    推断题。从第五段提到的“To understand the killer algae further, scientists must…and determine….They also need to know….”,可知要对这种微生物有进一步的了解,还有更多的研究工作要做。因此选B。

  • 第24题:

    单选题
    Which of the following statements is not mentioned as serious consequences of coral loss?
    A

    A reduction in tourism.

    B

    Increased coastal damage from hurricanes.

    C

    The extinction of the estimated 1 million species of fish.

    D

    The collapse of reef fisheries.


    正确答案: A
    解析:
    录音中提到的珊瑚损失(coral loss)的严重后果包括“the collapse of reef fisheries, a reduction in tourism and increased coastal damage from hurricanes”,对应选项A、B和D的内容,因此选C。
    【录音原文】
    Coral loss can have serious consequences, including the collapse of reef fisheries, a reduction in tourism and increased coastal damage from hurricanes. Coral decline also threatens the estimated 1 million species of fish, invertebrates and algae found in and around the world’s reefs. Several National Academies reports examine the environmental role of coral reefs and suggest ways to protect these and other marine resources.