滚动轴承的预洗可用洗涤剂，最后应在洗涤剂滴尽后用矿物油进行终洗

多项式（5x-2y）²+（5x-2y）z分解因式的结果是（　　）

A．（5x-2y）（1+z）

B．（5x-2y）z+1

C．（5x-2y）（5x-2y+z）

D．以上都不对

—________do you do?

—I'm a worker.     [ ]

A. How  

B. What    

C. Which    

D. Where

Colleges in the US have added a new subject, “great chemistry”, to their curriculum today. “Green chemistry (53) how we can develop products that won’t (54) the environment,” explains Paul Anastas, director of Yale University’s Center for Green Chemistry and Green Engineering, opened at the beginning of this year. The American Chemical Society, (55) approves more than 600 college chemistry programs, only lists about a dozen that teach green chemistry. But that (56) is growing.
Cambridge College in Massachusetts is offering “ an introduction to green chemistry” course this gall and is offering the nation’s first bachelor’s and master’s (57) in green chemistry. The program will have classes in environmental science and even environmental (58) and policy. These subjects are not (59) taught to chemistry major.
Employers (60) the introduction of green chemistry. Businesses are increasing seeking graduates (61) backgrounds in the subject because it can help them make or save money in he development and manufacturing of products. “We need people who can not only understand their place (62) , but also understand the worldwide perspective,” said Adam Peterson, a chemical division manager at Dow Corning Corp.

A．injure
B．distress
C．wound
D．hurt

如果某事务成功完成执行，则该事务称为______事务。

关于氮平衡描述正确的是（）

A.氮代谢物主要随粪便排出为主

B.分解代谢为主时，机体处于正氮平衡

C.饮食对氮平衡无影响

D.尿液对氮平衡无影响

E.留置胃管引流对氮平衡有影响