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【单选题】
高速 路上巡警开车在公路上以 8 0km/h 的恒定速度巡查,在同一车道上巡警前方的一辆轿车发出一个已知频率的电磁波,如果该电磁波被那辆轿车反射回来时,巡警车接收到的电磁波频率比发出时低,说明那辆轿车的车速 ( )A.
高于 8 0km/h
B.
低于 8 0km/h
C.
等于 8 0km/h
D.
无法确定
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举一反三
【单选题】Q 9 What would the man do first of all to solve the problem?
A.
Find the reason for the present difficulties.
B.
Locate the beginning of the problem.
C.
Look at the many causes behind the problem.
D.
Examine the history of labor relations in the company.
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Halloween
B.
Christmas
C.
All Saints' Day
D.
Christmas Eve
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【单选题】-Mr. Wang,I have a fever. What should I do? 一First of all, you should ____your temperature.
A.
ask
B.
see
C.
test
D.
take
【简答题】First of all,what do you work as? _________.(我是一位驻地工程师,也是主管这个工地的工地主任。)
【单选题】听力原文：W: First of all, I would like you to tell me a bit about what you've been doing. M: Well, I left school after I'd done my A-levels. I really wanted to study art. But a friend of my father's offer...
A.
They are having a chat.
B.
One is interviewing the other.
C.
They are talking about the weather.
【简答题】But first of all ,we want to know what we have to do before sending our tender.
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