救生艇喷水和空气系统的作用是保持艇内的温度和空气流通。
参考答案:错
单词拼写。
1. Richey was glad to have a chance to ______ (采访) a few foreigners who attended "Join the Fun
in Jinling" yesterday.
2. We can enjoy f______ air in the countryside.
3. We feel quite ______ /ri'lkst / when having a music class.
4. The astronauts ______ (描述) what they had seen in space.
5. The abacus was invented in the sixth ______ /senturi/ by the Chinese.
6. He r______ to go to the party so I had to go there instead.
7. It was cold,but the trip was ______. (令人愉快)
8. We hope it will be sunny tomorrow, for our ______ /'piknik/.
关于类风湿结节的特点错误的是()
A.直径数毫米至数厘米
B.质硬
C.有压痛
D.常出现在关节伸侧受压部位的皮下组织
E.对称性