小明跑800m时用了3分钟,他800m跑速度是______ m/s.
s=800m,t=3min=180s,
v=st=800m180s=4.44m/s.
故答案为:4.44.
句型转换。
1. The designer designed the casual clothes. (改为被动语态)
________________________________________
2. The bus is very big, it can hold ten people. (同义句)
The bus is ______ ______ to hold ten people.
3. They worked in the hospital for 9 hours yesterday. (对划线部分提问)
______ ______did they work in the hospital yesterday?
4. The show will start at 10:30 tomorrow morning. She said. (连成一个宾语从句)
She said ______ the show ______start at 10:30 tomorrow morning.
5. We will meet at our school gate at 8:00 tomorrow. (对划线部分提问)
______ and ______shall we meet?
善疏肝胆气滞的药物是()
A.陈皮
B.青皮
C.乌药
D.沉香
E.薤白