中国进口粮食从（）开始。

Windows 98的设备管理程序负责组织和管理系统中的各种I/O设备，有效地处理用户(程序)对这些设备的使用请求，完成实际的I/O操作。在下列有关Windows 98设备管理功能的叙述中，正确的是

A．在Windows 98中安装任何I/O设备，均需要安装厂商提供的相应的驱动程序

B．SPOOLing技术主要是将打印机等独占设备改造成共享程序

C．Windows98中的所有设备驱动程序均是WDM驱动程序

D．在管理打印作业时，只能按“先进先出”的顺序打印，用户不可调整打印顺序

正常人胸部触诊检查语音震颤，最弱的部位是（）

A.左胸上部

B.右胸上部

C. * * 下部

D.肩胛间区

E.肺底

When David Williams left the college, he went to Australia. When he returned to England for a visit twenty years later, he decided to go back to his old college.

David was very glad when he found out that his old college teacher was still teaching there. He went to visit the old man, and after they had an interesting talk, the teacher went out to get something. While he was away, David saw an exam paper on the desk. He looked at the date on it and saw that it was given to the students a week ago. David picked the paper up and read it. When  the teacher came back, David said to him, ”Mr. Smith, I’m sure that these are right the same questions that you asked us in our exams twenty years ago! How is that possible?”

“Yes, that’s right,” agreed the teacher. “The questions are the same, but the answers have changed.”

45. David went to______  after he left the college.

A. England       B. Australia      C. another college       D. his teacher’s office

46. David felt ______ when he found out that his college teacher was still teaching there.

A. worried      B. sorry      C. surprised       D. happy

47. The students took the same exam_____.

A. twenty years ago         B. while David’s teacher was away

C. a week ago              D. while David read the paper

48 Can you guess why the teacher still used the same exam paper twenty years later? Because______.

A.times have changed, answers have changed, too  B  different students have the same answers  

C. the students like to take the same exam       D. the teacher loved his students very much

使子宫内膜增生变化的激素是（）

A.雌激素

B.孕激素

C.雄激素

D.PRL

E.抑制素

婴幼儿空腹时铅在肠道的（）会成倍增加。

A.储存量

B.活跃程度

C.存在机会

D.吸收率