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【单选题】
心脑血管疾病预防重点应放在A.
一级预防
B.
二级预防防
C.
一、二预防
D.
三级预防
E.
二、三级预防
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举一反三
【单选题】An advantage of nylon rope over manila rope is that nylon rope ________.
A.
can be used in conjunction with wire or spring-lay rope
B.
can be stored on decks exposed to sunlight
C.
can hold a load even when a considerable amount of the yams have been abraded
D.
gives audible warning of overstress whereas manila does not
【单选题】An advantage of nylon rope over manila rope is that nylon rope（）.
A.
can hold a load even when a considerable number of the yarns have been abraded
B.
can be stored on deck，exposed to sunlight
C.
can be used in conjunction with wire or spring-lay rope
D.
gives audible warning of overstress whereas manila does not
【单选题】He has proved his courage in the battle. Through tests time and time again, this kind of rope____strong.
A.
was proved
B.
has ben turned out
C.
turned
D.
proved
【单选题】An advantage of nylon rope over manila rope is that nylon rope ______.
A.
can be used in conjunction with wire or spring-lay rope
B.
can be stored on decks exposed to sunlight
C.
can hold a load even when a considerable amount of the yarns have been abraded
D.
gives audible warning of overstress whereas manila does not
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