单选题：Paragraph 4__________

题目分类：理工类
题目类型：单选题
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题目内容：

Paragraph 4__________ A．No evidence to indicate bad effects of naturally contaminated soil
B．Potential hazards of human contaminated soils
C．Research on channels of heavy metals getting into human food chain
D．Geology and health problems
E．Rocks-the ultimate source of soil pollution
F．Long-term health effects on children

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答案解析：

The American Heart Association recommended widely using the

The American Heart Association recommended widely using the self-contained heart

分类：理工类题型：单选题

The dentist has decided to extract her bad tooth.

The dentist has decided to extract her bad tooth.A．take out B．repair C．push in D

分类：理工类题型：单选题

Don't be afraid. I am not going to hurt you.

Don't be afraid. I am not going to hurt you.A．fear B．astonished C．shocked D．frig

分类：理工类题型：单选题

Paragraph 3 ___________.

Paragraph 3 ___________. A．Control of Respiration B．Beauty of Fresh Cut Flowers

分类：理工类题型：单选题

At the meeting both sides exchanged their views on a wide Sc

At the meeting both sides exchanged their views on a wide Scope of topics they

分类：理工类题型：单选题