中药上的霉菌、害虫吸收后，引起分子电离，从而产生自由基
查看答案
航空运费就是指运输始发地机场至目的地机场间的运输货物的航空费用，不包括其它费用。()
A. 正确
B. 错误
The main concern of the passage is to______
A. advocate particular strategies for future efforts to organize certain workers into labor unions
B. explain differences in the unionized proportions of various groups of public-sector workers
C. evaluate the effectiveness of certain kinds of labor unions that represent public-sector workers
D. analyzed and explain an increase in unionization among a certain category of workers
E. describe and distinguish strategies appropriate to organizing different categories of workers
警察的社会性表现在它的社会管理职能上。()
A. 正确
B. 错误
微信支付 
支付宝支付