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【单选题】
铁素体是碳溶解在( )中形成的间隙固溶体。A.
α—铁
B.
γ—铁
C.
δ—铁
D.
β—铁
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举一反三
【单选题】The brave soldier would prefer to _____ rather than ______ and in the end the enemy had to kill him.
A.
dying, giving in
B.
die, to give in
C.
dying, to giving in
D.
die, give in
【简答题】通过叶轮机械的轴而交换的功被称作（ ）。
【单选题】After five days' fighting, the enemy had to admit . [ ]
A.
defeat
B.
debate
C.
success
D.
decade
【判断题】The underlined part in the following sentence is not an auxiliary: The enemy had to give up finally.
A.
正确
B.
错误
【单选题】The war lasted several years. ____ the enemy had to surrender.
A.
On end
B.
In end
C.
In the end
D.
At the end
【单选题】The enemy had to______after heavy losses.
A.
restrain
B.
register
C.
retreat
D.
regulate
【单选题】Under our vigorous offensive, the enemy had to give _____. [ ]
A.
away
B.
way
C.
off
D.
out
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