向心性心肌肥大发生的主要原因是（） A.心肌收缩能力加强 B.冠脉血流量增加 C.心

在软件开发过程中，以下说法正确的是______。

A．程序流程图是逐步求精的好工具
B．N-S图不可能任意转移控制，符合结构化原则
C．判定表是一种通用的设计工具
D．程序流程图和N-S图都不易表示模块的层次结构

最可能的诊断是（）。

A．牙间 * * 炎

B．边缘性龈炎

C．急性坏死性龈炎

D．疱疹性龈口炎

E．青少年牙周炎

重点工程建设项目应当坚持（）

A.安全第一的原则

B.为保证工程质量不怕牺牲

C.确保进度不变的原则

D.投资不超过预算的原则

Some of Man's closest relatives in the animal kingdom are under serious threat because of human activity, according to a recently published report.

Almost one in three of all apes and monkeys are now considered to be in danger of dying out and disappearing from our planet, if action is not taken soon.

The report, which was produced for the World Conservation Union (WCU), shows that 114 of the world's 394 kinds could be lost forever, and the main reason they are threatened is the continuing loss of forests where most of these animals live. In addition, illegal wildlife trade, climate change and commercial（商业的）hunting for meat are also endangering them.

What's more, the problem is getting worse. The number of species on the organization’s Red List has increased by 3 to 25 since 2005.

Russell Mittermeier, the main researcher of the WCU report, said, "You could fit(安置) all the surviving members of these 25 species in a single football stadium. So the problem is obviously urgent."

The scientists, who drew up the Red List, believe that the situation is now so bad that if action is not taken immediately, it will result in primate(灵长目动物) species dying out - something which has not happened in over a century.

The loss of habitat caused by the clearing of forests for wood, farmland and fuel continues to be the main reason for the decreasing number of primates, according to the report, and the problem was most severe in Asia.

The loss of forest trees is also responsible for 20 percent of all greenhouse gases - more than all the cars, trucks, trains and airplanes in the world combined.

小题1:What is the main subject of the report discussed in the text?

A．Climate change.

B．Loss of animal habitat.

C．Animal protection.

D．Endangered animals小题2:How many animals were on the Red List in 2005?

A．22

B．19

C．25.

D．28.小题3:The spokesman refers to 'a football stadium' in paragraph 5 to stress that ______.

A．the animals enjoy playing sports

B．these animals should be placed there for protection

C．there are not many of these animals left

D．the report was announced there小题4:What is the main cause of the greenhouse gas problem according to the text?

A．Airplanes.

B．Loss of trees.

C．Factory pollution.

D．Road vehicles.

试述主轴推力轴承位置的布置方式有哪几种？