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【单选题】
汽油选用的原则是以发动机工作时不发生( )为前提。A.
飞车
B.
表面燃烧
C.
C爆燃
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【单选题】梁拱是甲板的横向曲度，其作用是______。①增加甲板强度；②增加保留浮力；③增加总纵强度；④便于甲板排水；⑤防止甲板上浪
A.
①②③
B.
①④⑤
C.
②④⑤
D.
①②④
【单选题】---Could I ride an electric bicycle to school, Mr. Wang? ---No, you ____. Students under the age of 16 aren't allowed to ride electric bicycles.
A.
couldn't
B.
needn't
C.
can't
D.
shouldn't
【简答题】East of our school ____ two companies _____ make electric motorbikes. A．are, that B．is, where C．is, that D．are, where
【单选题】East of our school __________ that make electric motorbikes.
A.
are two companies
B.
is two companies
C.
two companies is
D.
two companies are
【单选题】梁拱是甲板的横向曲度，其作用是（ ） I、增加甲板强度；II、增加保留浮力；III、增加总纵强度；IV、便于甲板排水；V、防止甲板上浪
A.
I、II、III
B.
I、IV、V
C.
I、IV、V
D.
I、II、IV
【单选题】梁拱是甲板的横向曲度,其作用是:I . 增加甲板强度;II . 增加保留浮力;III . 增加总纵强度;IV . 便于甲板排水;V . 防止甲板上浪
A.
Ⅰ、Ⅱ、Ⅲ
B.
Ⅰ、Ⅳ、Ⅴ
C.
Ⅱ、Ⅳ、Ⅴ
D.
Ⅰ、Ⅱ、Ⅳ
【单选题】梁拱是甲板的横向曲度，其作用是： I、增加甲板强度；II、增加储备浮力；III、增加总纵强度；IV、便于甲板排水；V、防止甲板上浪
A.
I、II、III
B.
I、IV、V
C.
II、IV、V
D.
I、II、IV
【单选题】As she lives quite near our school , she often goes to work on an electric bike ___ in her car .
A.
other than
B.
rather than
C.
more than
D.
less than
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