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【单选题】
发现人员落水较早,并在海上可见时,最好采用()。A.
回
B.
威廉逊旋回
C.
回或斯恰回
D.
威廉逊旋回或斯恰回
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【简答题】我国的电力工业的标准频率是 HZ。
【简答题】燃油停供控制主要包括 减速断油控制 和________________。
【单选题】Before the year of 2010, which theory was more prevent, Replacement Theory or Interbreeding Theory?
A.
Replacement Theory
B.
Interbreeding Theory.
C.
Not given.
【简答题】The Theory of Continental Drift has had a long and turbulent history since it was first proposed by Alfred Wegener in 1910. (46)Vigorously challenged yet widely ignored, the theory had languished for ...
【单选题】若 A , B 为同阶方阵,且满足 AB = O ,则有( )
A.
A ＝ O 或 B ＝ O
B.
| A | ＝ 0 或 | B | ＝ 0
C.
D.
A 与 B 均可逆
【单选题】We have decided to accept the proposal that he _____ his new theory. We have decided to accept the proposal that he _____ .
A.
offer
B.
offering
C.
offered
D.
would offer
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