下列各组中，是同类项的是（ ） A．-2x2y和xy2 B．x2y和x2z C．

蚯蚓的身体由许多彼此相似的___________组成，属于环节动物。

连词成句，我最棒！

1. friend, send, I, may, my, an e-mail

_____________________________________________________

2. go, this, hall, down, we, straight 

_____________________________________________________

3. does, the, computer, hotel, have, a 

_____________________________________________________

4. write, do, want, you, e-mail, an, friend, your, to, to 

_____________________________________________________

5. do, I, put, the, where, stamp

_____________________________________________________

理性认识向实践飞跃之所以重要，是因为

A．理论要服务于实践

B．理论要指导实践

C．认识世界的目的是为了改造世界

D．这次飞跃可以使精神转化为物质

建设部、公安部对住宅安全防范设施有什么具体要求？

The CFA Institute Standards of Practice Handbook requires CFA Institute members to do all the following EXCEPT:（）

A. to inform employer, clients, and potential clients of benefits received for recommending products or services. 

B. receive written permission from both their employer and outside clients to engage in investment consulting outside the firm. 

C. to disclose in writing to the proper regulatory authority all observed violations of the securities laws and regulations.