[单选题]

If Trial 4 had been extended, at approximately what time would 0.45 mL of 0 2 have reacted?

A．70 sec

B．140 sec

C．240 sec

D．270 sec

参考答案与解析：

相关试题

If the doctor had been available, the child ________.

[单选题]If the doctor had been available, the child ________.A.would not dieB.could

  • 查看答案

    • If the doctor had been available, the child ________.

    [单选题]If the doctor had been available, the child ________.A.would not dieB.could

  • 查看答案

    • had been taken into a church was caught

    [单选题]hadbeentakenintoachurchwascaughtbecausetracesofwax,foundonhisclothes,_______fromthesortofcandlesusedonlyinchurches.A)hadcomeB)comingC)comeD)thatcame

  • 查看答案

    • Some of his suggestions had been rejecte

    [单选题]Some of his suggestions had been rejected ______ they were not practicable.A． asB． whenC． untilD． if

  • 查看答案

    • The rice ______ if you had been more car

    [单选题]The rice ______ if you had been more careful.A． would not be burningB． would not burnC． would not have been burntD． would not burnt

  • 查看答案

    • A state of emergency had been in force s

    [单选题]A． state of emergency had been in force since the emperor was overthrown.A．overtakenB．overrunC．overturnedD．overdrawn

  • 查看答案

    • This used piston had been tested and app

    [单选题]This used piston had been tested and approved as a spare part by the （） during last annual repair.A . agentB . shipchandlerC . surveyorD . engineer

  • 查看答案

    • If business had been carried out to our

    [单选题]If business had been carried out to our satisfaction，we（）to renew the Agency Agreement.A . hadagreedB . alreadyagreedC . shallagreeD . shouldhaveagreed

  • 查看答案

    • Had they not been working so hard,they__

    [试题]H．ad they not been working so hard，they______(not achieve)so much.

  • 查看答案

    • He said the situation there was not as bad as had been( )

    [单选题]He said the situation there was not as bad as had been( )A.saidB.drawnC.pri

  • 查看答案