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【简答题】
设集合S={α，β，γ，δ}，在S上定义一个二元运算*，运算规则如表5-14所示，证明：〈S，*〉是一个循环群． 表5-14 * α β γ δ α α β γ δ β β α δ γ γ γ δ β α δ δ γ α β
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【单选题】The chemical factory is far away in the mountains. It is nearly ____ ride from the city.
A.
a six-hour
B.
a six hour’s
C.
six hour’s
D.
six hour
【单选题】The school is far away from the city, it is located __________ an island.
A.
in
B.
at
C.
on
D.
to
【简答题】中介语偏误的 “化石化”现象表明中介语的偏误具有 ( ) 特点。
【单选题】--How long have you _ Teresa? -- For three years by now. Our wedding anniversary is coming next week. .
A.
got married to
B.
married
C.
married with
D.
been married to
【单选题】下面的关键字:发光二极管、电阻、电容等在Proteus里面的关键词是什么?
A.
Resistors、Capacitors、Led
B.
Led、Resistors、Capacitors
C.
Resistors、Led、Capacitors
D.
Capacitors、Led、Resistors
【简答题】The city is far away from home, so they will __________leave early tomorrow morning. Complete the sentences with ‘must’ or ‘have to’.
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