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【单选题】
Bird Flu is a(n) ___________ disease. Whenever it occurs, children should be kept from going to public places.A.
infectious
B.
acute
C.
serious
D.
chronic
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举一反三
【单选题】I’d rather you ______anything about it for the time being. Ado B. didn’t do c. don’t D. didn’t
A.
1
B.
2
C.
3
D.
4
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. For many years, scientists couldn't figure out how atoms and molecules combined...
A.
4 billion years ago.
B.
After seven days.
C.
Many years ago.
D.
In 1953.
【简答题】( )满足螺纹互换性的基本要求是可旋入性和连接可靠性。29．( )满足螺纹互换性的基本要求是可旋入性和连接可靠性。
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