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【判断题】
摩尔吸光系数的单位为 mol·cm/L。A.
正确
B.
错误
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举一反三
【简答题】Ear muffs or cotton plugs
are used to reduce pollution ofA. Air B. Nuclear C. Noise D. Thermal
【判断题】Applied microbiologists are employing microorganisms in bioremediation to reduce pollution effects.
A.
正确
B.
错误
【简答题】对某边进行往返观测，得观测值分别为87.213m和87.226m，则相对误差为 。（注：答案中只写出分母部分）
【简答题】对某边往、返观测，得观测值分别为87.213米和87.226米。则观测结果为（）米，相对误差为（）。
【单选题】We are confident that the environment ________ by our further efforts to reduce pollution.
A.
improves
B.
will be improved
C.
has improved
D.
was improved
【单选题】Their chief aim is to reduce pollution in the area.
A.
the amount of
B.
rely on
C.
respond to
D.
deal with
【简答题】对某边往、返观测,得观测值分别为87.213米和87.226米。则观测结果为________米。
【简答题】Their chief aim is to reduce pollution in the area.
【简答题】对某边进行往返观测,得观测值分别为87.213m和87.226m,则观测结果为 ,相对误差为 。
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