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【多选题】
滚动轴承主要由 ( )几部分组成。A.
内圈
B.
外圈
C.
滚动体
D.
保持架
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皮皮学刷刷变学霸
举一反三
【单选题】Many people have got the habit of buying flowers for their mothers on _______.
A.
Mothers’ Day
B.
the Mothers’ s Day
C.
the Mother’s Day
D.
Mother’s Day
【单选题】The boy's rudeness shocked them. They put down the boy's rudeness to his parents' having spoiled him. 请选择最佳答案
A.
They were shocked by the boy's rudeness, which was put down to his having been spoilded by his parents.
B.
They were shocked by the boy's rudeness，they put down the boy's rudeness to his having been spoiled by his parents.
C.
They had been shocked by the boy's rudeness, the boy's rudeness was put down to his parents' having spoiled him.
D.
They had been shocked by the boy's rudeness, which was put down to his having been spoilded by his parents.
【单选题】Nowadays many people have trouble ______
A.
sle e p
B.
asle e p
C.
sleeping
D.
s l ep t
【简答题】下列关于台式机的特点,错误的是
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