声音在15℃空气中的传播速度是340m/s,传播170m距离所需的时间为 s.
0.5
根据句意及首字母完成单词。
1. Yang Liwei and Fei Junlong are a_____, they're great.
2. Tom likes animals very much. He k_____a dog in his home.
3. It’s possible for people to live in the s_____station.
4. 一What are you going to be when you grow up?
—I want to be a computer p_____.
5. Believe you ! You can do it y_____.
6. Exercise more, eat l_____junk food, and you will keep healthy.
7. The girl f_____in love with the Great Wall when she came to China.
8. This term we'll have f_____learning English.
下列哪项对诊断门脉高压最有特征性
A.脾大B.腹水C.侧支循环的建立及开放D.蜘蛛痣E.脾功能亢进的表现