管路系统的特性曲线是随着()的增加而上升。
A、流量
B、扬程
C、轴功率
D、效率
参考答案:A
句型转换。
1. Let's have dinner. (改为否定句)
Let's_____ ______dinner.
2. What can I do for you?(同义句)
Can I ______ ______?
3. Those are rulers. (改为单数形式)
______ is a ______.
4. His brother has a computer. (改为一般疑问句)
________his brother a computer?
5. Your ID card is on the dresser. (对划线部分提问)
______ is ______ ID card?
顶管法的排土方式不包括()。
A、螺旋排土
B、浆液泵送
C、人工刨土
D、皮带输送排土