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【判断题】
Fe—Fe3CE点是在1148°C时碳在γ-Fe中的最大溶解度,也是钢和铁的分界点,ωc ≤ 2.11%的铁碳合金属于钢,ωc > 2.11%的铁碳合金属于铸铁A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】Why air must be pumped into the plane?
【单选题】We need to ______ the purpose of the experiment again.
A.
clarify
B.
cling
C.
claim
D.
clap
【单选题】A stamp design includes several elements required for it to ________ its purpose satisfactorily.
A.
adapt
B.
apply
C.
accomplish
D.
acquire
【单选题】The edge of the wise over the unwise lies in their tendency to _______ about the purpose of their life.
A.
promote
B.
account
C.
insist
D.
speculate
【简答题】It was a m struggle, a death march to the end. ( completely stupid and without any purpose )
【单选题】Why did Polly and Digory begin their adventures?
A.
Because of the bad weather.
B.
Because of the hot weather.
C.
Because they were in a good mood.
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