下列有关CO2的实验中,只能证明CO2物理性质的实验是( )
A.
B.
C.
D.
答案:B
用适当的介词填空
1. What's the capital America , Washington D.C. or New York?
2. It is very hot in my hometown winter.
3. Qingdao is the east of' China.
4. There are some low mountains the coast.
5. —Please tell me where you are .
—Shanghai.
6. Cambridge is f'amous its university.
7. Dalian has a population 5. 3 million people.
8. I am looking forward visiting the Great Wall.
肺结核咯血可用().
A.缩宫素
B.垂体后叶素
C.鱼精蛋白
D.麦角胺
E.维生素K