下列引起腹泻的疾病中属于肠道感染病变的是（）。 A.结肠多发性息肉病 B.血吸虫病

简述消费者求偿权的范围。

据了 (168) ，这两天，南京飞武夷山的航班就在 (169) 用晚上剩余运力接送旅游团队，江苏东航国旅甚至打出了武夷山双飞四日游780元的特价，而南京～武夷山的正常单程机 (170) 每张就是690元!

The astronauts know ______ control the direction and the speed of the spaceship. [ ]

A. how can they

B. what's to

C. how to

D. what can they

如何确认劳动合同无效？由何部门确认？

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.

The key to SNMP (71) is its simplicity. It has a small command set that does a good job of collecting information from (72) any network device. In a SNMP environment, (73) of the work is handled by the network management system. Devices that are being managed are not (74) with processing (75) that might affect their performance.

72（）

A．many

B．almost

C．a lot of

D．nearly