推移载荷
参考答案:
也称床沙载荷,指直接覆于床底上的有两个被搬运颗粒直径那么厚的做层状运动的底部颗粒。
读短文,判断正(T)误(F)。
I have a classmate, Mike Brown. He is an American. He is now in Beijing. His father and mother work
in Beijing, too. They are English teachers. Everyday his father takes him to school. He goes to school on his
father's bike. They like Chinese people and food. We are good friends.
( ) 1. Mike Brown is my friend.
( ) 2. His father and mother take Mike to school every day.
( ) 3. Mike goes to school on his bike.
( ) 4. Mike and I are in the same class.
( ) 5. Mike and his parents work in China.
某型号石英钟,现在成本是原来成本的85%,现在成本是37.4元,则原来的成本是( )
A.42元
B.44元
C.46元
D.47元