A根据下面短文回答下列问题。One evening Mrs. Evans asked her husband to take her to a very expensive restaurant in the city because some film stars (影星) and famous people were there sometimes. She wanted to see these people.Soon after they had ordered their meal (点餐), a very attractive (引人注目) man and a woman came into the restaurant and sat down at a table nearby. They were having beautiful clothes, and Mrs. Evans said to her husband, "Look at them, Mike. I’m sure I’ve seen their pictures in a magazine (杂志)"Later, Mrs. Evans asked the waiter (服务员), "Who are they""Oh, they aren’t famous." The waiter answered."Really How do you know that" Mrs. Evans said in surprise."Because they asked me who you were," the waiter answered.The waiter told Mrs. Evans they were not famous because he knew them before.

A . 4250 B . 750 C . 4350 D . 850

A . 没有充分的证据表明因素对因变量有显著影响 B . 有充分的证据表明因素对因变量有显著影响 C . 有充分的证据表明因素之间的交互作用对因变量有显著影响 D . 无法得出任何结论

A . A.3.6% B . 5.5% C . 9.8% D . 12.1%

A . A.与1973年相比，2008年女性科研工作的增长速度大约是男性的7.2倍 B . 2002~2012年，男性科研工作者和女性科研工作者申请到的NIH平均基金额的差距在缩小 C . 2008年各领域平均工资中，物理无天文学的男性、女性平均工资均为最高 D . 女性在科研工作者中所占的比例从1973年的9.1%提高到了2008年的34.2%

A . 145.6 B . 155.6 C . 160.6 D . 165.6

A . A.环境管理主要包括清洁卫生管理、绿化管理 B . 环境管理基本上包括清洁卫生管理、绿化管理、虫害防治管理三部分 C . 环境管理是指在物业管理区域内，房屋周围明确的征用、占用、租用地域进行清洁卫生管理和绿化管理 D . 环境管理即清洁卫生清洁管理

A . 1000 B . 500 C . 750 D . 250

A . A.98亿 B . 134亿 C . 180亿 D . 211亿

A . A.A公司可以向乙县人民政府申请行政复议 B . A公司可以向甲市人民政府申请行政复议 C . A公司可以向乙县工商局申请行政复议 D . A公司可以向甲市工商局申请行政复议

A . 32.5 B . 37.5 C . 40 D . 35

A . A.行政复议申请必须采用书面形式 B . 行政复议的举证责任由被申请人承担 C . 行政复议不收费 D . 行政复议原则上采取书而审查的方式

A . A.生物 B . 化学 C . 物理和天文学 D . 所有领域的平均

A . 买入执行价格较高的看涨期权，卖出等量执行价格较低的看跌期权 B . 卖出执行价格较低的看跌期权，买人等量执行价格较高的看跌期权 C . 买入执行价格和数量同等的看涨和看跌期权 D . 卖出执行价格较高的看跌期权，买入等量执行价格较低的看跌期权

第一篇 Volunteers are being recruited(征募) to eat raw potatoes in the first human trials of a vaccine grown in genetically engineered vegetables. Researchers in Texas hope that people who eat the potatoes will be protected against common gut(肠，肠子) infections. They believe this technique could prove to be a cost-effective way of growing vaccines in developing countries where such diseases are still killers. Other researchers previously succeeded in using similar techniques to produce potential vaccines Now Hugh Mason and his colleagues at Texas A & M University(得克萨斯农业及机械大学) their plant vaccines on mice and plan to recruit 15 volunteers for a human trial. The team first tested the technique in tobacco plants. They took a strain of Escherichia coli(大肠杆菌) bacteria that causes food poisoning, and identified the part of the poison which binds to its victims gut cells. They then used a modified plant bacterium called Agrobacterium tumefasciens to transfer the segment of DNA which manufactures the binding protein into the tobacco plant. Under normal circumstances, these bacteria transfer packets of DNA into plant cells to force the plant to manufacture the nutrients they need. But in the modified bacteria, the DNA package includes the gene to pro- duce the binding protein. Once the foreign DNA segment was incorporated(结合，合并) into the tobacco's own DNA, the bacteria were killed off with antibiotics. Mason's team then grew these modified tobacco plants and found that they produced the E. coli binding protein. Proof of success came when the tobacco leaves were mashed up(捣碎) and squirted into the stomachs of mice. Mason says that within days the mice started producing specific antibodies to the E. coli poison, but suffered no ill effects from digesting the binding protein. Mason then produced genetically engineered potatoes and fed these to mice, with similar results. Mason's team have used plants to produce vaccines against a number of other infectious agents. For example, they have made a vaccine using a protein from the shell of the Norwalk virus, which causes diarrhoea(腹泻) in children. A third vaccine has also been produced in tobacco using a surface protein from the hepatitis B virus. But Mason says that so far they have only been able to produce small amounts of it in potatoes. Although a vaccine already exists against hepatitis B, a cheaper plant version could make mass immunisation(群众性免疫) possible. One problem with growing potatoes to produce vaccines is that cooking tends to destroy the protein component of the vaccine, so they must be eaten raw. Mason thinks that bananas may be a better option. "One banana could potentially produce a whole host of different vaccines," says Mason. The purpose of this text is______。 A. to prove that doctors don't like vegetables B. to amuse the reader by telling some funny things C. to describe how vegetables can grow vaccines for their own use D. to tell the reader about a cheaper way of growing vaccines

A．销售成本分析 B．销售收入分析 C．盈亏转折点分析 D．亏损分析

A．when it is absorbed by matter B．when it is cloudy C．because they can pass through solid objects D when the sunrays are fierce E．when a change in the nucleus of an atom takes place F．when electron rearrangement takes place

根据下面选项，回答下列各题 A．<img src='https://img2.soutiyun.com/ask/3525001-3528000/78e1d8a9ec91e3a39920143c6176c38c.jpg' />B．<img src='https://img2.soutiyun.com/ask/3525001-3528000/8a3584d6491f580d512e33e6b81ec80c.jpg' />C．<img src='https://img2.soutiyun.com/ask/3525001-3528000/4a1d7b39241cf77b20a4dfbe2d192a9c.jpg' />D．<img src='https://img2.soutiyun.com/ask/3525001-3528000/e0ce0272dcfb1596e49c11219c60d707.jpg' />E．<img src='https://img2.soutiyun.com/ask/3525001-3528000/a4ca98e906128a59a5d1fa9d1599817d.jpg' />单室模型静脉注射给药，体内药量随时间变化的关系式

A．82.96 B．98.21 C．101.77 D．106.67

1.说明你想旅游的地点; 2.说明你为什么选择这个地点; 3.描述你的旅行计划。