功能性消化不良的主要病理生理学基础（）。
A．幽门螺杆菌感染
B．上胃肠道动力障碍
C．应激因素D．胃肠动力学异常和内脏感觉异常
E．精神因素
参考答案：B
当水下考古队员从沉船上将古代瓷碗打捞出水面，碗在水里上升的过程中（ ）
A．水只对碗的外壁有压强
B．水只对碗的内壁有压强
C．水对碗的压强逐渐变大
D．水对碗的压强逐渐变小
Which of the following sentences doesn’t contain(包含) an object clause（宾语从句）?
A．Many people believe robots will do most of our work.
B．Scientists should be able to develop plants that grow on Mars.
C．People think that humans on Mars have to wear special boots to make themselves heavier.
D．We all know the next Olympic Games will be held in Beijing.
