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【单选题】
是一种比镇静钢脱氧还要充分彻底的钢,所以其质量最好,适用于特别重要的结构工程。
A.
半镇静钢
B.
沸腾钢
C.
镇静钢
D.
特殊镇静钢
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举一反三
【单选题】The little chick_________ the earthworm, deciding whether to swallow it or let it go. [     ]
A.
stared at
B.
glanced at
C.
looked into
D.
glared at
【单选题】图中2所指的表面结构要求Ra的上限值是:【图片】
A.
25 μ m
B.
1.6 μ m
C.
3.2 μ m
D.
都不正确
【单选题】图中2所指的表面结构要求Ra的上限值是:【图片】
A.
none
B.
1.6 μ m
C.
3.2 μ m
D.
25 μ m
【简答题】U1 Additional Language Quiz There are ten sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sente...
【单选题】The little chick ______ the earthworm, deciding whether to swallow it or let it go ? [     ]
A.
stared at
B.
glimpsed at
C.
looked into
D.
glared at
【单选题】The little chick ________ the earthworm, deciding whether to swallow it or let it go. [     ]
A.
glimpsed at
B.
looked into
C.
stared at
D.
glared at
【简答题】U4 Additional Language Quiz There are ten sentences in this section. Beneath each sentence there are four choices or phrases marked A, B, C and D. Choose one word or phrase that best completes the sen...
【单选题】图中2所指的表面结构要求Ra的上限值是:【图片】
A.
1.6 μ m
B.
3.2 μ m
C.
25 μ m
D.
None
【单选题】图中2所指的表面结构要求Ra的上限值是:【图片】
A.
3.2 μ m
B.
1.6 μ m
C.
25 μ m
D.
None
【单选题】“Mum !” she cried suddenly , tears down her cheeks .
A.
rolling
B.
rolled
C.
to roll
D.
being rolled
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