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【简答题】
按含碳量不同，铁碳合金的室温组织可以分为工业纯铁、_____和白口铸铁。
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皮皮学刷刷变学霸
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【单选题】13字长作为CPU的主要性能指标之一,主要表现在( )。
A.
CPU计算结果的有效数字长度
B.
CPU一次能处理的二进制数据的位数
C.
CPU最长的十进制整数的位数
D.
CPU最大的有效数字位数
【单选题】These flowers ______, or they will die soon. [ ]
A.
must water
B.
must be water
C.
must be watered
D.
must be watering
【单选题】Why does Hank have to work late?
A.
He has to attend a meeting.
B.
He has to write a report.
C.
He has to close the office.
【单选题】----Why does Lily have few friends? ----Because she thinks only of herself and doesn’t __________other people.
A.
care of
B.
make up
C.
care about
D.
take care
【单选题】—Where is your father? —He ______ flowers in the garden.
A.
waters
B.
must water
C.
must be watering
D.
must have watered
【简答题】故宫中人们通常说的“三宫六院”指的是?
【单选题】Why does the woman have problems getting the book from the library?
A.
It wasn't published recently.
B.
It is in great demand.
C.
It was sold out already.
D.
It isn't owned by the library.
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