铰孔时铰刀反转会使塞在刀具后面与孔壁之间的切屑破坏已加工孔表面，或破坏（），甚至折断

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。

A.　Goods for auction (拍卖) sales

　　B.　Definition of bidding

　　C.　Way to sell more goods by auction

　　D.　Auction sales in history

　　E.　Brief introduction to auctions

　　F.　Making a larger profit as an auctioneer

小题1:______

Auctions are public sales of goods, conducted by an officially approved auctioneer. He asks the crowd assembled in the auction-room to make offers, or “bids”, for the various items on sale. He encourages buyers to bid higher figures, and finally names the highest bidder as the buyer of the goods. This is called “knocking down” the goods, for the bidding ends when the auctioneer strikes a small hammer on a table at which he stands.

小题2: ______

The ancient Roman probably invented sales by auction, and the English word comes from the Latin auction, meaning “increasing”. The Romans usually sold in this way the goods taken in war. In England in the eighteenth centuries, goods were often sold “by the candle”: a short candle was lit by the auctioneer, and bids could be made while it stayed alight.

小题3: ______

Practically all goods whose qualities vary are sold by auction. Among these are coffee, skins, wool, tea, furs, silk and wines. Auction sales are also usual for land and property, furniture, pictures, rare books, old china and similar works of art.

小题4: ______

An auction is usually advertised beforehand with full particulars of the articles to be sold and where and when they can be viewed by potential buyers. If the advertisement cannot give full details, catalogues are printed, and each group of goods to be sold together, called a “lot”, is usually given a number. The auctioneer need not begin with Lot 1 and continue in the order of numbers: he may wait until he notices the fact that certain buyers are in the room and then produce the lots they are likely to be interested in.

小题5: ______

The auctioneer’s services are paid for in the form of a percentage of the price the goods are sold for. The auctioneer therefore has a direct interest in pushing up the bidding as high as possible. He will not waste time by starting the bidding too low. He will also play on the opponents among his buyers and succeed in getting a high price by encouraging two business competitors to bid against each other.

下列植物按从简单到复杂的顺序排列的是（　　）

A．水绵→葫芦藓→肾蕨→油松→玉米

B．葫芦藓→水绵→肾蕨→油松→玉米

C．水绵→葫芦藓→肾蕨→玉米→油松

D．葫芦藓→水绵→油松→肾蕨→玉米

下列四个成语中与项羽有关的（）

A、隔岸观火

B、暗渡陈仓

C、背水一战

D、破釜沉舟

阅读下列《孟子》选段，回答后面问题。

       “设为庠序学校以教之；庠者养也，校者教也，序者射也；夏曰校，殷曰序，周曰庠，学则三代共之：皆所以明人伦也。人伦明于上，小民亲于下。有王者起，必来取法，是为王者师也。”（《孟子·滕文公上》）

        孟子曰：“仁言不如仁声之入人深也，善政不如善教之得民也。善政，民畏之；善教，民爱之。善政得民财，善教得民心。”（《孟子·尽心上》）

1．下列对选段内容的理解，不正确的一项是（     ）

A．这两段文字均强调了政治管理的重要性，这也正是孟子仁政思想的一部分。

B．孟子认为可以通过“庠、序、学、校”来使百姓了解伦理关系。

C．孟子认为良好的教育比良好的政治更加重要，因此主张先推行教育。

D．上位者明白了伦理关系，处于下位的百姓自然就会相亲相爱。

2．请简要分析以上选段中孟子阐述的主要观点。

__________________________________________________________________

调频通信中采用予加重和去加重是为了（）

A、提高调制信号高端频率成分的信噪比

B、抑制外部干扰

C、提高调制信号低端频率成分的信噪比

D、改善非线性失真