下死哪一项措施不能促使公田转化为私田 （ ）
A．铁器牛耕的使用
B．“相地而衰征”
C．“初税亩”
D．郑国渠的兴修
答案：D
额定压力为6.3MPa的液压泵，其出口接邮箱，则液压泵的出口压力为（）。
A.6.3MPa
B.0
C.6.2MPa
D.不确定
对画线部分提问。
1. His telephone number is 9288288.
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2. The American teachers have taught in our school for ten years.
3. Many people now keep in touch with each other by e-mail of QQ.
