计算:(1)-(-8)-12+(-5)(2)-22+2×(-3)0+(-6)÷(

题型:解答题

问题:

计算:
(1)-(-8)-12+(-5)
(2)-22+2×(-3)0+(-6)÷(-
1
3
)-2

(3)20012-2001×1999(必须用整式乘法公式)
考点:零指数幂(负指数幂和指数为1)平方差公式完全平方公式
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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.

17()

A.prevent

B.explore

C.prohibit

D.generate

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套期保值是指生产经营者在现货市场上买进或卖出一定的现货商品的同时,在期货市场上卖出或买进与现货______的期货商品。

A.数量相同

B.方向相同

C.价格相同

D.品种相同

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将5吨钢铁从北京运往天津,选择( )方式比较合适。

A.铁路运输

B.公路运输

C.水路运输

D.航空运输

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电网企业未全额收购可再生能源电量,造成可再生能源发电企业经济损失的,( )。

A.应当承担相关责任
B.不应当承担相关责任
C.应当承担赔偿责任
D.不应当承担赔偿责任

题型:解答题

可缩性金属支架主要组件是()、()和()。

A、背板

B、卡缆

C、拉杆

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