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【单选题】
液压制动总泵装配前各零件应用( )彻底清洗。A.
汽油
B.
煤油
C.
碱溶液
D.
酒精 P76
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【简答题】老年人常见的药物不良反应有哪些?
【单选题】Passage One Just under a year ago, a sharp drop in equatorial Pacific sea-surface temperatures indicated the end of the 1997—1998 El Niño.Called by someone“the climate event of the century”,it was by ...
A.
The fact that scientists went through a series of bad experiences．
B.
The fact that Pacific Rim governments needed to give more funding to study El Niño．
C.
The fact that the 1997—1998 El Niño was unpredictable because there were no warning signs．
D.
The fact that computer forecast models alone were not able to predict the nature of the 1997—1998 El Niño．
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