在阀门注脂维护中,要保持密封脂的注入压力()管道介质的压力,密封脂才能注入到阀座四周
A.高于
B.低于
C.等于
D.没有关系
参考答案:A
Lina is a Chinese tennis star. She plays tennis well. She plays tennis every day. She has some tennis rackets and tennis balls. She has lots of healthy food. For breakfast, she has eggs and milk. She usually plays tennis for three hours in the moming. Then she has a big lunch-carrots, rice, fish and meat. After that she plays tennis for two hours in the afternoon.For dinner, she has chicken, apples and soup. After dinner, she watches tennis on TV for half hour. She has a busy life.
小题1:. Lina is a _ star.
A.ping-pong
B.tennis
C.basketball
D.baseball小题2:She plays tennis for _every day.
A.two hours
B.three hours
C.four hours
D.five hours小题3:She has _for lunch.
A.chicken
B.ice cream
C.tomatoes
D.fish and meat小题4:.She watches tennis on TV _ .
A.in the moming
B.in the evening
C.in the afternoon
D.after lunch小题5:She is _
A.free
B.unhealthy
C.healthy .
D.boring
夸美纽斯的教育思想为西方_______ 教育理论的发展奠定了基础。 ( )
A.古代
B.中古
C.近代
D.现代