选择题:The man loves nature and the soil. That is why he

题目内容:
The man loves nature and the soil. That is why he has bought a piece of land in the country and __________ to grow his own vegetables. 
(A) taken the difficulty
(B) had the trouble
(C) had the difficulty
(D) taken the trouble
参考答案:

一条公路的某处有一水平弯道,弯道半径为50m,若一辆汽车车轮与地面的静摩擦系数为0.6,则此车在弯道

一条公路的某处有一水平弯道,弯道半径为50m,若一辆汽车车轮与地面的静摩擦系数为0.6,则此车在弯道处行驶的最大安全速率为 ( ) m-s-1(g=9.8m

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定时器的哪一种方式构成13位定时器( )(A)方式0(B)方式1(C)方式2(D)方式3

定时器的哪一种方式构成13位定时器( )(A)方式0(B)方式1(C)方式2(D)方式3

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10. (问答题) 裸眼完井有哪两大类?各有何特点?(本题10.0分)

10. (问答题) 裸眼完井有哪两大类?各有何特点?(本题10.0分)

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