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【单选题】

What happened to the man when he was mountain climbing().

A. He slipped from the mountain.
B. He got lost in bad weather.
C. He lost his equipment.

A.
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参考解析:
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刷刷题刷刷变学霸
举一反三

【单选题】根据各组分之间淌度的不同而实现分离

A.
pH值测定法
B.
高效液相色谱
C.
热分析法
D.
电泳法
E.
X-射线衍射法

【单选题】In 1954 a turning point in medical history, resulting from applied bionics, was the first" open heart" surgery done in Minneapolis, Minnesota, by Dr. W. Lillehei’’s techniques for the first time allow...

A.
the replacement of Dr. Clark’’ s heart was a failure
B.
there was still a long way to go in applied bionics
C.
applied bionics was promising
D.
the first artificial heart was most effective

【单选题】价值工程中的成本就生产企业而言是指( )的费用。

A.
设计、生产
B.
购置、维修和使用
C.
产品科研、设计、试验、试制、生产和维修
D.
生产、使用和维修