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【判断题】
高速钢的热硬性可达600℃，常用于制造切削速度较高的刀具，且在切削时能长期保持刃口锋利，故又称锋钢。A.
正确
B.
错误
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【简答题】Fill in the blanks in the following sentences with the correct form of the phrases from the box. carry away, carry out, feel for, get over, marvel at, provide for, take away, throw oneself into Every ...
【多选题】How many brothers and sisters _____?
A.
have you got
B.
do you have
C.
are you having
【简答题】How many brothers did he have?
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