滑油系统封严利用空气压力，增压空气来自何处（）A.4级高压压气机引气； B.9级高压

一正常男孩的某一体细胞处于有丝分裂的后期，则此时细胞中的染色体的形态有[ ]

A．23种

B．24种

C．46种

D．92种

关于牛市套利正确的是（）。

A.牛市套利对于可储存的商品并且是在相同的作物年度最有效

B.如果在反向市场上，近期价格要高于远期价格，牛市套利是买入近期合约同时卖出远期合约

C.在正向市场上，牛市套利的损失相对有限而获利的潜力巨大

D.在反向市场上，近期价格要高于远期价格，牛市套利是买入近期合约同时卖出远期合约

Directions: Read the following Passage. Complete the diagram by using the in formation from the passage.

Write NO MORE THAN THREE WORDS for each answer.

     Detroit is convinced that small, stylish, and fuel-efficient cars are what American drivers want. But are

automakers right?

     For years, the auto industry's critics have been calling for Detroit to roll out small cars that they say

Americans are demanding for. The question is, do we really want to drive small cars? The answer, according

to some analysts, is already clear. "Domestic auto companies feel forced to offer smaller vehicles because of

pressure from the government." says John Wolconowicz, an auto analyst for IHS Global Insight.

     Whether we want the vehicles or not, automakers are devoted to a small-car sales strategy. General Motors

is unveiling (推出) three new small cars-the Chevrolet Cruze, a small car due next year; the Spark, a minicar

due in 2011; and the Chevy Aveo, a compact. Mike DiGiovanni, executive director of the global market notes

that GM is presuming a return to high oil prices that will cause the market to shift to smaller vehicles.

     At Ford, there are no plans to abandon production of big trucks. But the company is making small cars a

priority, launching the Ford Fiesta and the C-MAX, a compact car with sliding doors and three rows of seats,

in 2011. "We can't even think about growing our market share without having a strong pressure in the small-

vehicle market" George Pipas, Ford's chief U.S. sales analyst says.

     Not everyone is so big on Americans going small. This seems to be evident on dealer lots (停车场). Jack

Kain, a Ford dealer in Versailles, Ky., said the F150 truck remains his bigger seller. He predicts trucks will

continue to outsell small cars, at least in his area "People won't give up the safety and comfort of the larger

cars," he says.

     But Ford's Pipas is confident that many will embrace the industry's new focus. Detroit's big hopes, he

admits, are riding on the future of small cars.

                                                        Title: Big Hopes on 1.________

汽车出车前应做什么？（工务系统防范一般B1类事故禁令第22条）