Scientists say it may be five or ten years _____ it is possible to test this medicine on human patients.(A) since (C) after(B) before (D) when

题目

Scientists say it may be five or ten years _____ it is possible to test this medicine on human patients.

(A) since (C) after

(B) before (D) when

 

 

相似考题

1.—Your French is so good. How long have you been in France?—??____________I was five.A. Until B. Since C. When D. Before

2.When are the visitors excepted to ask questions?A During the lunch hour .B. After the welcome speech .C. Before the tour of the labs.

3.When installing a new PCIe network card, when should manufacturer software and drivers beinstalled?()A. Before inserting the PCIe network card in the caseB. After inserting the new PCIe network card in the caseC. They will be automatically loaded after installationD. Load them concurrently with the PCIe network card

4._______A. Before B. After C. Since D. If

参考答案和解析

选B
之前
科学家说这个药想在病人身上试验，还要等个5到10年。。。


更多“Scientistssayitmaybefiveortenyears_____itispossibletotestthismedicineonhumanpatients.(A)since(C)after(B)before(D)when”相关问题

  • 第1题：

    At which of the following times should the administrator refer to the HCL?()

    A. Prior to purchasing hardware

    B. Before installation

    C. When installing drivers

    D. After installation


    参考答案：A

  • 第2题：

    When did Mr. Green get to the airport that afternoon? __________ .

    A. Before 3:30 B. After 3:30 C. At about 5:00


    正确答案：A

  • 第3题：

    38 A if B before C since D after


    正确答案：B

  • 第4题：

    27． When did Tom go to the shop for glasses?

    A． Before lunch．

    B． After lunch．

    C． In the morning．

    D． In the evening．


    正确答案：B
    27.B【解析】由第一段倒数第二句可知。

  • 第5题：

    She had just finished her homework her mother asked her to practice playing the piano yesterday.

    A. when B. while C. after D. since


    正确答案：A

  • 第6题：

    It′ s a long time __________ I saw youlast.
    --Yes, and what a pity! It will be a longtime __________ we see each other again.

    A.since; before
    B.when; since
    C.before; when
    D.before; since

    答案：A
    解析：
    考查连词：①It+is／has been+一段时间+since(自从……起)+sb．／sth．did；．②It+was／will be+一段时间+before(多久之后才)+sb．／sth．did／do；③时间状语从句：It+was+具体钟点+when(当……时)+ sb．／sth．did；④强调结构：It+was+介词+具体钟点+that+sb．／sth．did。句意为“——自从上次见你，已经有很长一段时间了。——是的，遗憾的是，还要很长一段时间我们才能再相见。”

  • 第7题：

    A) when B) if C) after D) before


    答案：A
    解析：

  • 第8题：

    When will the primary processor core dump run in case of a switchover？（）

    • A、never takes place
    • B、periodically
    • C、during switchover
    • D、after switchover
    • E、before switchover

    正确答案:D

  • 第9题：

    When is it advisable to dump the waste toner from a technicians service vacuum？（）

    • A、When it is full.
    • B、It is not recommended.
    • C、Before performing preventative maintenance.
    • D、After each call.

    正确答案:B

  • 第10题：

    Which of the following procedures should be performed to minimize possible problems for a customer when updating software?（）

    • A、Apply the updates without committing.
    • B、Commit the new updates to be certain there is no change after the next reboot.
    • C、Update one fileset at a time and test to ensure that it works before updating the next fileset.
    • D、No action is necessary since the software can always be uninstalled and re-installed.

    正确答案:A

  • 第11题：

    单选题
    At which of the following times should the administrator refer to the HCL？（）
    A

     Prior to purchasing hardware

    B

     Before installation

    C

     When installing drivers

    D

     After installation


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    63. A when      B before     C since        D after
    A

    A

    B

    B

    C

    C

    D

    D


    正确答案： A
    解析：

  • 第13题：

    When are packets processed in an inbound access list?()

    A. Before they are routed to an outbound interface.

    B. After they are routed for outbound traffic.

    C. After they are routed to an outbound interface while queuing.

    D. Before and after they are routed to an outbound interface.

    E. Depends on the configuration of the interface

    F. None of the above


    参考答案：A

  • 第14题：

    20 When are the visitors expected to ask questions?

    A During the lunch hour．

    B After the welcome speech

    C Before the tour of the labs


    正确答案：A

  • 第15题：

    When are the visitors expected to ask questions ?

    A. During the lunch hour

    B. After the welcome speech

    C. Before the tour of the labs


    正确答案：A

  • 第16题：

    When are the visitors expected to ask question?

    A. During the lunch hour.

    B. After the welcome speech.

    C. Before the tour of labs.


    正确答案：A

  • 第17题：

    27． Ann-s mother died ____________ ．

    A． before she was born

    B． after she was born

    C． when she grew up

    D． when her sister was born


    正确答案：B
    27．B【解析】见文章第四句“His wife died after his on- ly daugher was born"可知此处的his only daughter 就是Ann。Ann的母亲在她出生后就死了。

  • 第18题：

    Her uncle′s health has greatly improved______ he stopped smoking.

    A.before
    B.since
    C.when
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    答案：B
    解析：
    考查连词辨析。before“在……之前”，since“自从”，when“当……时”，while“当……的时候；虽然；然而”。根据句意“自从戒烟以来，她叔叔的健康已经有了很大的改善”可知，只有since符合题意。故选B。

  • 第19题：

    When do sailors make the ship fast? （）

    • A、When a ship is unmooring.
    • B、After a ship is in position alongside a wharf.
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    正确答案:B

  • 第20题：

    When are packets processed in an inbound access list?（）

    • A、Before they are routed to an outbound interface.
    • B、After they are routed for outbound traffic.
    • C、After they are routed to an outbound interface while queuing.
    • D、Before and after they are routed to an outbound interface.
    • E、Depends on the configuration of the interface
    • F、None of the above

    正确答案:A

  • 第21题：

    When installing a new PCIe network card, when should manufacturer software and drivers beinstalled?（）

    • A、Before inserting the PCIe network card in the case
    • B、After inserting the new PCIe network card in the case
    • C、They will be automatically loaded after installation
    • D、Load them concurrently with the PCIe network card

    正确答案:A

  • 第22题：

    单选题
    When two AC generators are being paralleled, the breaker should be closed with the synchroscope pointer mating in the （）
    A

    slow direction, just before the 12 o'clock position

    B

    fast direction, just after the 12 o'clock position

    C

    fast direction, just before the 12 o'clock position

    D

    slow direction, just after the 12 o'clock position


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Which of the following procedures should be performed to minimize possible problems for a customer when updating software?（）
    A

    Apply the updates without committing.

    B

    Commit the new updates to be certain there is no change after the next reboot.

    C

    Update one fileset at a time and test to ensure that it works before updating the next fileset.

    D

    No action is necessary since the software can always be uninstalled and re-installed.


    正确答案： C
    解析： 暂无解析

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