胃特有的运动形式是
A．紧张性收缩
B．分节运动
C．逆蠕动
D．容受性舒张
参考答案：D
成年人每日喝（）水适宜？（每杯250ml）
A.2—3杯
B.5—8杯
C.9—10杯
_____ should have helped the policeman when he caught the thief on the bus.[ ]
A. He, you and me
B. You, he and I
C. I, you and he
D. I, he and you
