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【判断题】
在修理中,人为原因造成的汽车故障没有任何规律,大多数原因是由于维修技术人员未严格按照维修操作规程作业。A.
正确
B.
错误
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【单选题】That you cannot feel the movement of earth does not mean that the earth is really______.
A.
steady
B.
sturdy
C.
stubborn
D.
stationary
【简答题】A．Because the Earth is heavily polluted. B．Because nature cannot recycle its resources. C．Because there are more and more people living on the Earth. D．Because no more new resources can be added.
【单选题】Researchers cannot ( ) the possibility that Earth may one day run out of its orbit.
A.
hand out
B.
drop out
C.
rule out
D.
keep out
【简答题】样品经处理后的处理液体积较大,待测试成份浓度太低,此时应进行浓缩,以提高被测组分的浓度,常用的浓缩方法有
【简答题】样品经处理后的处理液体积较大,待测试成份浓度太低,此时应进行浓缩,以提高被测组分的浓度,常用的浓缩方法有 和 。
【简答题】样品经处理后的处理液体积较大,待测试成份浓度太低,此时应进行浓缩,以提高被测组分的浓度,常用的浓缩方法有 和 。
【单选题】People feel cool when they are near a lake or an ocean because______.
A.
the earth cannot make the air over the earth hot
B.
the earth is very hot
C.
cool air from the water moves towards the land
D.
the water is colder than the earth
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