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【单选题】
有线的说法正确有是()A.
是封闭的平面图形
B.
空间封闭的曲线
C.
一定是椭圆
D.
所有的都能用近似圆弧法画出
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反馈参考答案：
举一反三
【单选题】The police let him go, because they didnt find him guilty ______ the murder. [1999]
A.
of
B.
in
C.
over
D.
on
【简答题】三相异步电动机的调速方法有调压调速、变极调速、________ 调速。
【单选题】The police let him off. They him.
A.
allowed
B.
permitted
C.
didn’t forbid
D.
didn’t punish
【单选题】The police let him go, because they didn't find him guilty ______ the murder.
A.
of
B.
in
C.
over
D.
on
参考解析：
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