一个物体受到多个力作用做匀速直线运动,若在物体运动过程中撤掉一个力,而其它几个力保持

题型:单项选择题

问题:

一个物体受到多个力作用做匀速直线运动,若在物体运动过程中撤掉一个力,而其它几个力保持不变,则物体()

A.一定做直线运动

B.一定做曲线运动

C.一定做匀速圆周运动

D.可能做曲线运动,也可能做直线运动

考点:高中物理匀速直线运动匀速直线运动题库
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With the spread of inter-active electronic media a man alone in his own home will never have been so well placed to fill the inexplicable mental space between cradle and crematorium. So I suspect that books will be pushed more and more into those moments of travel or difficult defecation (1) people still don’t quite know what to do with.

When people do read, I think they’ll want to feel they are reading literature, or (2) something serious. (3) you’re going to find fewer books presenting themselves as no- nonsense and (4) assuming literary pretensions and being packaged as works of art. We can expect an extraordinary variety of genre, but with an underlying (5) of sentiment and vision.

Translators can only (6) from this desire for the presumably sophisticated. We can look forward to lots of difficult names and fantastic stories of foreign parts enthusiastically (7) by the overall worship of the "global village" Much of this will be awful and some wonderful, (8) don’t expect the press or the organizers of prizes to offer you much help in making the appropriate distinctions. They will be chiefly (9) in creating celebrity, the greatest enemy of discrimination, but a good prop for the (10) consumer.

Every ethnic grouping over the world will have to be seen to have a great writer--a phenomenon that will (11) a new kind of provincialism, more chronological than geographic, (12) only the strictly contemporary is talked about and (13) . Universities, including Cambridge, will include (14) their literature syllabus novels written only last year. (15) occasional exhumation for the Nobel, the achievements of ten or only five years ago will be largely forgotten.

In short, you can’t go too far wrong when predicting more of the same. But there is a (16) side to this--the inevitable reaction against it. The practical things I would like to see happen--publishers seeking less to (17) celebrity through extravagant advertising, (18) and magazines (19) space to reflective pieces--are rather more improbable than the Second Coming (耶稣复临). But dullness never quite darkens the whole planet. In their own idiosyncratic fashion a few writers will (20) be looking for new departures.

8()

A.but

B.so

C.for

D.as

题型:单项选择题

放坡基坑施工中,施工不当也会造成边坡失稳,主要因素有()等。

A.基坑边坡坡顶堆放材料、土方及运输机械车辆等增加了附加荷载

B.基坑降排水措施不力,或地面水、基坑周围地下管线漏水渗入基坑边坡的土层中

C.开挖后边坡暴露时间不够

D.基坑开挖过程中,未及时刷坡

E.没有按设计坡度进行边坡开挖

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头痛在应用麦角胺后可缓解,最可能的是()

A.肌紧张性头痛

B.青光眼

C.偏头痛

D.三叉神经痛

E.颅内占位性病变

题型:单项选择题

下面加点的实词解释不正确的一项是( )

A.六国破灭,非兵不利……(《六国论》)兵器,武器

B.秦发兵击之。(《屈原列传》)军队

C.兵旱相乘……(《论积储疏》)战争

D.纸上谈兵。士兵

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雍和宫内的法轮殿平面呈什么形状?

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