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【多选题】
钢号40Cr表示( )。A.
含碳量为0.4%
B.
不锈钢
C.
合金调
D.
含Cr量少于1.5％
E.
含Cr量大于1.5％
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举一反三
【简答题】证明方程 在区间 内至少有一个实根。
【简答题】A．He taught English in Chicago. B．He was crippled in a car accident. C．He worked to become an executive. D．He was born with a limp.
【单选题】The energy released by the chain reaction is transformed into heat. .
A.
discharged
B.
put
C.
delivered
D.
conveyed
【单选题】Higher level classes are taught mainly through ______.
A.
giving a lot of lectures to students
B.
involving students in discussions
C.
asking students questions in class
D.
answering students' questions in class
【简答题】证明方程 在 内至少有一个实数根
【简答题】A．He taught English in Chicago. B．He was crippled in a car accident. C．He worked to become an executive. D．He was born with a limp.
【简答题】A.He taught English in Chicago． B.He was crippled in a car accident． C.He worked to become an executive． D.He was born with a limp．
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