一个圆柱与一个圆锥等底等体积,圆锥的高是54厘米,圆柱的高是( )厘米。
18
Fill in the blanks with the right forms of the given words. 用所给单词的适当形式填空。
1. A rabbit (have) four feet.
2. The Chinese team (win) the game last week.
3. Mr Smith is (sit) in a chair.
4. I know some famous Chinese (story).
5. What's (happen) when you arrive home?
6. Danny (fall) from a tree yesterday.
7. There (be) some milk, some apples in the kitchen.
8. My bag is (big) than your bag.
9. I want to call (me) family in China.
10. Mrs Smith has (make) noodles for you.
适用于有振动或含尘气流速度高的设备的密闭罩是()。
A.局部密闭罩
B.整体密闭罩
C.大容积密闭罩
D.柜式密闭罩