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问题 选择题

_______ a satisfactory operation, the patient recovered from illness very quickly.

A．Having been given

B．Having given　

C．Giving 　　　

D．Being given

答案

答案：A

改错题

下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏词符号（∧），并在其下面写上该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从11处起）不计分。

Many teenagers feel lonely, even if no one understands them and the changes they are going through. Day by day, everything seems differently, yet the same. Life never seems to be going fast enough; yet, by other ways, like a race car, life seems to be rushing so fast to control. These feelings are a common part of adolescence—the time of life between child or adult. And, though it may sometimes be difficult to believe, you are not alone—every adult have gone through adolescence, and your friends are going through them right now along with you. It is common for teenagers to feel lonely and misunderstood. These feelings can be being thought of as growing pains— difficulties that teenagers face during they grow to adults.
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选择题

如图所示，半径为R的圆形光滑轨道置于竖直平面内，一质量为m的金属圆环在轨道上可以自由滑动，以下说法不正确的是   (      )

A．要使小环做完整的圆周运动，小环在最低点的加速度应大于4g

B．要使小环做完整的圆周运动，小环在最低点的速度应大于

C．如果小环在最高点时速度大于，则小环挤压轨道内侧

D．小环在最低点时对轨道压力一定大于重力
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