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【多选题】
经检测两只前照灯发光强度均偏低，其主要原因（）。A.
发电机工作不良
B.
前照灯搭铁不良
C.
灯泡老化
D.
蓄电池端电压偏低
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反馈参考答案：
举一反三
【简答题】输入圆的半径,输出圆的面积和周长,保留二位小数。 PI=3.14
【单选题】Usually there is ______ traffic in the streets on weekdays than on Sundays.
A.
little
B.
less
C.
few
D.
fewer
【单选题】Private cars are required to take turns off roads one out of five weekdays ___the traffic pressure.
A.
relieve
B.
relieving
C.
torelieve
D.
relieve
【简答题】判断下列说法的正误，并说明理由。 语言符号具有任意性的特点，但复合符号的组合不是任意的。
【单选题】According to the study discussed in the second paragraph, which of the following weekdays is the most productive?
A.
Friday.
B.
Wednesday.
C.
Monday.
D.
Thursday.
【单选题】They go to school by bus on weekdays. (变成一般疑问句)
A.
Are they go to school by bus on weekdays?
B.
Does they go to school by bus on weekdays?
C.
Is they go to school by bus on weekdays?
D.
Do they go to school by bus on weekdays?
【简答题】A．Everyday. B．Weekends. C．Weekdays. D．Seldom.
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