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【单选题】
FX系列PLC中SET表示( )指令。A.
下降沿
B.
上升沿
C.
输入有效
D.
置位
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皮皮学刷刷变学霸
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【单选题】The best title for this passage is ______.
A.
Buy a Volvo with Air bags
B.
Make a Car Safe Inside
C.
Fasten Your Seat Belts
D.
Add Air Bags to Cars
【判断题】Air freight，like charterin9，will probably make up a larger share of the total airline business in the future．（ ）
A.
正确
B.
错误
【简答题】Air freight，like charterin9，will probably make up a larger share of the total airline business in the future．（ ）
【简答题】Ted Shreds doesn’t like cars. He wants people to stop driving because cars make the air dirty. Ted had an idea. He said,“I’m going to cycle around North America. I want to show everyone that cycling i...
【判断题】开展电子邮件推广有一个基本技巧,就是在书写电子邮件广告时,可以效仿网上随处可见的广告语言的表达方式,这更容易引起他人的注意,不必非得采用自己的广告语言。
A.
正确
B.
错误
【单选题】The students were told to make ______ study of the air situation in ______ city of Beijing.
A.
不填 the
B.
a the
C.
the the
D.
a 不填
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