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【判断题】
摩擦阻力是由流体作用在物体表面上的切应力引起，压差阻力是由于流体绕流时边界层分离所引起。A.
正确
B.
错误
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【单选题】Participation in the Olympic Games is looked upon as an honor as well as an achievement.（ ）
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】What items are usually included in a sourcing order?
【单选题】Most museums are just for looking. But today some ofthem have things for you to touch. The signs say, "________!"
A.
Be touching
B.
To touch
C.
Do touch
D.
No touch
【单选题】What soup does Karl order?
A.
Potato soup.
B.
Cream soup of broccoli.
C.
Vegetable beef soup.
D.
Thick bean soup .
【单选题】What food does Jessica order on the phone?
A.
A family-set hamburger.
B.
A double cheeseburger.
C.
A hamburger and French fries.
【简答题】阅读理解。 Most people want to work, but it has become more difficult in today's world to find work for everyone. The economy ( 经济) of the world needs to grow by 4% each year just to keep the old number of...
【单选题】Trains stop here in order to _______ passengers.
A.
get off
B.
picp up
C.
pull up
D.
bring up
【简答题】根据短文内容，判断正（T）误（F）。 Coffee has become the most popular drink in America. Today American people drink more coffee than people in any other countries. People drink coffee at breakfast, at lunch, at dinne...
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