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【简答题】
把12个风车,平均分成3份,每份()个。
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反馈参考答案：
举一反三
【单选题】— An Internet friend has asked me to meet him. — Oh, it's dangerous to meet him ______. [ ]
A.
lonely
B.
loud
C.
along
D.
alone
【单选题】以下关于UDP校验和特点的描述中,错误的是
A.
UDP校验和的检验范围包括伪头部、UDP报头与从应用层来的数据
B.
计算校验和时需要在UDP用户数据报之前增加12B的伪头部
C.
伪头部只在计算时起作用，既不向底层传输，也不向高层传递
D.
UDP长度指UDP数据报的长度，包括伪头部的长度
【单选题】It's dangerous to one's shoulder while driving.
A.
look over
B.
look back
C.
look around
D.
look ahead
【单选题】It's dangerous to play on the thin ice. It's not ____ to hold a person. [ ]
A.
hard enough
B.
enough hard
C.
enough cold
D.
enough thick
【单选题】— I left my keys in the room yesterday. I had to get in _____ the window. — It's dangerous to do that. [ ]
A.
in
B.
through
C.
over
D.
to
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