机会致病寄生虫是A．体外寄生虫 B．暂时性寄生虫 C．免疫功能低下时致病的寄生虫 D

观察急性肾衰竭少尿期患者的病情时，应特别注意有无（）

A.低钾血症

B.高钾血症

C.低钠血症

D.代谢性酸中毒

E.高磷血症

鞣质和生物碱配伍会发生（）

A.浑浊或沉淀

B.产生有毒物质

C.变色现象

D.产气现象

E.爆炸现象

某市空调制造厂(增值税)一般纳税人 2005年10月份购进原材料取得增值税专用发票上注明税款共800万元，支付运输单位运费，取得的发票注明运费20万元，装卸费3万元，保险费3万元，建设基金1万元；本月向某公司销售空调取得销售收入1000万元(含税)，同时取得安装空调的劳务费10万元，款项已付清；兼营空调租赁业务取得收入30万元 (独立核算)。该空调厂应( )。(保留两位有效数字)

A．应纳增值税27.59万元；应纳营业税 1.80万元：

B．应纳增值税29.04万元，应纳营业税 1.50万元

C．应纳增值税28.62万元；应纳营业税 1.50万元。

D．应纳增值税27.17万元，应纳营业税 1.80万元

殷墟文化同下列哪一文化间存在继承关系？（）

A.二里头文化

B.二里岗文化

C.下七垣文化

D.岳石文化

There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no matter how good a brain he has to begin with, an individual will have a low order of intelligence unless he has opportunities to learn. So the second factor is what happens to the individual—the sort of environment in which he is reared. If an individual is handicapped environmentally, it is likely that his brain will fail to develop and he will never attain the level of intelligence of which he is capable.

The importance of environment in determining an individual’s intelligence can be demonstrated by the case of the identical twins, Peter and Mark Being identical, the twins had identical brains at birth, and their growth processes were the same. When the twins were three months old, their parents died, and they were placed in separate foster homes. Peter was reared by parents of low intelligence in an isolated community with poor educational opportunities. Mark was reared in the home of well to do parents who had been to college. He was read to as a child, sent to good schools, and given every opportunity to be stimulated intellectually. This environmental difference continued until the twins were in their late teens, when they were given tests to measure their intelligence. Mark’s IQ was 125, twenty five points higher than the average and fully forty points higher than his identical brother. Given equal opportunities, the twins, having identical brains, would have tested at roughly the same level.

The best statement of the main idea of this passage is that （）.

A．human brains differ considerably

B．the brain a person is born with is important in determining his intelligence

C．environment is crucial in determining a person’s intelligence

D．persons having identical brains will have roughly the same intelligence