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【单选题】
某四冲程六缸发动机,排气门在BDC前42°打开则各缸间的动力重叠角度为 ( )A.
12°
B.
15°
C.
18°
D.
22°
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举一反三
【简答题】What vary considerably from place to place?Both ______ and the amount of tax.
【单选题】已知随机变量η的分布列为η=-1,P=0.1;η=0,P=0.2;η=1,P=a;η=2,P=0.3。则a=( )
A.
0.4
B.
0.6
C.
0.2
D.
0.3
【单选题】What is the most interesting place to visit in your country?
A.
What is the most interesting place to visit in your country ?
B.
What is the most interesting place to visit in your country ?
C.
/
D.
/
【单选题】— What’s the weather like in your hometown? —_______
A.
it’s a nice place.
B.
I like the food there.
C.
He asks me whether I like the weather.
D.
It’s cold in winter and hot in summer.
【单选题】What is a pound?
A.
A place where animals live.
B.
A place for animals to swim in.
C.
A place where homeless animals are kept.
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