恒切牙替换后唇系带位置为（） A.唇系带中的纤维组织伸入腭侧龈 * * B.唇系带一般附

读世界平均气温分布图，回答下列问题．

（1）世界最高气温在______洲北部，年平均气温约在______℃以上．

（2）世界最低气温在______洲，年平均气温约在______℃以下．

（3）从等温线分析，世界气温的分布规律是______．

（4）在北纬30°附近，年平均气温在0℃以下，比同纬度其他地方低10℃多的地区是______，其低温的主要原因是______．

（5）南半球的等温线与北半球相比较为______，这是因为______．

下列有关证券组合风险的表述中，错误的是（）。

A.证券组合的风险仅与组合中每个证券报酬率的标准差有关

B.持有多种彼此不完全正相关的证券可以降低风险

C.在不存在无风险证券的情况下，多种证券组合的有效边界就是机会集顶部从最小方差组合点到最高期望报酬率的那段曲线

D.证券报酬率的相关系数越小，机会集曲线就越弯曲，风险分散化效应也就越强

25岁女性患者，颜面和双下肢水肿伴少尿5个月，查血压140／95mmHg，尿蛋白（+++），红细胞（++）个／Hp，Hb105g／L，胆固醇10.2mmoVL．白蛋白21g／L，补体C3下降，Cr145μmol／L。

为确诊，应首选下列哪项检查（）

A.肾活检

B.静脉肾盂造影

C.双肾CT

D.双肾B超

E.肾活检

工程项目管理的核心是（）。

A．进度控制

B．合同控制

C．资源控制

D．质量控制

People in the mass advertising business and others who study American society have been very interested in the question: What does the American consumer like Max Lerner, a well-known scholar who has studied American society, has said that American consumers are particularly fond of three things: comfort, cleanliness, and novelty.

Lerner believes that the American love of comfort perhaps goes back to the frontier experience, where life was tough and there were very few comforts. This experience may have created a p desire in the pioneers and their children for goods that would make life more comfortable. Today, the American’s love of comfort is seen in the way they furnish their homes, design their cars, and travel. How Americans choose a new mattress for their bed is an example of the Americans love of comfort. Many Americans will go to a store where beds are set up, and they will lie down on several mattresses to see which one is the most comfortable.

Cleanliness is also highly valued by Americans. There is a p emphasis on keeping all parts of the body clean, and Americans see lots of TV commercials for soap. shampoo, deodorants, and mouthwash. Perhaps the Puritan (清教徒的) heritage has played some role in the desire for cleanliness. The Puritans, a strict Protestant (新教的) church group who were among the first settlers of America, stressed the need to cleanse the body of dirt and of all evil tendencies, such as sexual desire. The saying "Cleanliness is next to Godliness" reflects the belief of most Americans that it is important to keep not only their bodies, but also their clothes, their houses, their cars, and even their pets clean and smelling good. Indeed, many Americans are offended by anyone who does not follow their accepted standards of cleanliness.

Along with cleanliness and comfort, Americans love having things that are new and different. Perhaps this love of novelty comes from their pride in their inventiveness. American have always been interested in inventing new products and improving old ones. They like to see changes in cars, clothing, and products for the home. Advertisements encourage people to get rid of old products and try new ones, whether the old ones still work or not. And if they cannot afford to buy something now, advertisers encourage consumers to charge it on a credit card. "Buy now-pay later. \

The American love of comfort originated from（）。

A. the Americans’ great pride in their abundant natural resources

B. the early settlers’ belief in hard work

C. the pioneers’ p desire to make life more comfortable

D. the pioneers’ ignorance of frugality and conservation