扶动力头下接头的是（）。A、一钻工 B、二钻工 C、三钻工 D、司钻

I ran across an old photo of him the other day, thinking of some old things. He’s been dead for 25 years. His name was Rex.
36  was his favorite recreation(娱乐). He had so much 37 in the water as any person I have known. You didn’t have to throw a stick in the water to 38 him to go in. Of course, he would bring back a stick to you if you 39 throw one in.
That 40 me of that night, 41 he brought back a small box that he found somewhere--- how 42 nobody ever knew. Since it was Rex, it 43 easily have been half a race. The box wasn’t a good one. It was just a 44 old piece that somebody 45. Still it was something he wanted, probably 46 there was some difficulty in transportation（运输）. And that he thought could test his courage. We first knew about his achievement when, deep in the night, we 47 him trying to get the box up onto the porch(门厅). It sounded 48 two or three people were trying to tear the house 49 . We came downstairs and turned on the 50 light. Rex was on the top step trying to pull the thing up, but it had 51somehow. And he was just holding his own(坚持着). I suppose he would have held his own 52 dawn if we hadn’t helped him. The next day we carried the box miles away and threw it out. If we had thrown it out in a 53 place, he would have brought it home again, as a small token(象征)of his strength in such matters. 54, he had been taught to carry heavy wooden objects about and he was 55 of his skill.

题型：判断题

除鼠证书和免予除鼠证书自签发之日起6个月内有效。( )

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题型：单项选择题

今年国庆假期，虽然北京郊区不少项目的价格降价幅度已经很大，但多数购房者认为，降价房源的品质普遍较差，区域位置也不理想。持币待购者普遍认为，五环内房价下跌才刚刚开始，未来的房价还将回调，与其现在购买格局不太理想、位置较偏的房产，倒不如再等一段时间，等房价回调到位，再以可以接受的价格选择自己满意的商品房。

对这段文字理解最正确的一项是（）。

A．北京郊区的房价将在未来的很长一段时间内持续低迷

B．黄金周期间，北京并没有出现地产商期待的成交回暖

C．北京市五环以外的商品房品质普遍较差，位置较偏远

D．购房者对于北京的房价继续走低抱有较为坚定的信心

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题型：单项选择题

儿童膜性肾病最常见的病因为

A．骨髓瘤性肾病

B．糖尿病肾病

C．乙肝病毒相关性肾炎

D．系统性红斑狼疮

E．过敏性紫癜肾炎

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