化疗患者在治疗间歇期间应（）。 A.绝对卧床休息 B.组织适当户外活动 C.限制在室

符合下列哪些条件，可以视为重大合同（）

A、涉及较高专业技术或法律关系复杂的合同

B、签订和履行将对公司的生产经营活动产生重要影响的合同

C、合同的金额超过人民币50万元（含本数）

D、合同的金额超过人民币50万元（不含本数）

The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is (1) to say it anyway. He is that (2) bird, a scientist who works independently (3) any institution. He helped popularize the idea that some diseases not (4) thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.

(5) he, however, might tremble at the (6) of what he is about to do. Together with another two scientists, he is publishing a paper which not only (7) that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in (8) are a particular people originated from central Europe. The process is natural selection.

This group generally do well in IQ test, (9) 12-15 points above the (10) value of 100, and have contributed (11) to the intellectual and cultural life of the West, as the (12) of their elites, including several world-renowned scientists, (13) . They also suffer more often than most people from a number of nasty genetic diseases, such as breast cancer. These facts, (14) , have previously been thought unrelated. The former has been (15) to social effects, such as a p tradition of (16) education. The latter was seen as a (an) (17) of genetic isolation. Dr. Cochran suggests that the intelligence and diseases are intimately (18) . His argument is that the unusual history of these people has (19) them to unique evolutionary pressures that have resulted in this (20) state of affairs.

17（）

A.development

B.origin

C.consequence

D.instrument

测炉水硅时加酒石酸是为了防止水中（）、（）的干扰及还原过剩的钼酸盐。

钢坯加热时表面层所含的碳被氧化而减少的现象称为（）。

A.氧化

B.脱碳

C.过热

D.脱硫

山梨醇（）

A.增塑剂

B.增稠剂

C.遮光剂

D.防腐剂

E.矫味剂在胶囊组成中各物质分别起什么作用