泵车泵送系统的基本工作特点是:()。
A.低压小排量、高压大排量
B.低压大排量、高压小排量
C.高低压均小排量
D.高低压均大排量
参考答案:B
Here are two letters to George and his replies.
小题1:Alice is worrying about ________.
A. her friends B. her marks C. her height D her weight
小题2:Bob should _______ according to George’s letter.
A.take more exercise
B.talk to his friends
C.join a basketball team
D.learn some French.小题3:George advises Alice to talk to _____ for help.
A.her mother
B.her teacher
C.Bob’s teacher
D.Bob’s friends
“人之一心,天理存,则人欲亡;人欲胜,则天理灭。”提出这一主张的中国古代思想家是
A.董仲舒
B.程颢
C.朱熹
D.王守仁