卵石

在方向如图所示的匀强电场（场强为E）和匀强磁场（磁感应强度为B）共存的场区，一电子沿垂直电场线和磁感线方向以速度v0 射入场区，则　(   )

A．若v0 ＞E/B，电子沿轨迹Ⅰ运动，射出场区时，速度v＞v0

B．若v0 ＞E/B，电子沿轨迹Ⅱ运动，射出场区时，速度v＜v0

C．若v0 ＜E/B，电子沿轨迹Ⅰ运动，射出场区时，速度v＞v0

D．若v0 ＜E/B，电子沿轨迹Ⅱ运动，射出场区时，速度v＜v0

阅读理解。

     Wesla Whitfield, a famous jazz singer, has a unique style and life story, so I decided to see one of her

performances and interview her for my newspaper.

     I went to a nightclub in New York and watched the stage lights go up. After the band played an

introduction, Wesla Whitfield wheeled herself onstage in a wheelchair. As she sang, Whitfield's voice was

so powerful and soulful that everyone in the room forgot the wheelchair was even there.

     At 57, Whitfield is small and pretty, humorous and modest. Raised in California, Whirfield began

performing in public at age 18, when she took a job as a singing waitress at a pizza shop. After studying

classical music in college, she moved to San Francisco and went on to sing with the San Francisco

Opera Chorus.

Walking home from rehearsal (排练) at age 29, she was caught in a random shooting that left her unable

to move her body from the waist down. I asked how she dealt with the realization that she'd never walk

again, and she admitted that at the beginning she didn't want to face it. After a year of depression she

tried to kill herself. She was then admitted to a hospital for treatment, where she was able to recover.

     Whitfield said she came to understand that the only thing she had lost in this misfortunate event was

the ability to walk. She still possessed her most valuable asset--her mind. Pointing to her head, she said,

"Everything important is in here. The only real disability in life is losing your mind. "When I asked if she

was angry about what she had lost, she admitted to being annoyed from time to time, "Especially when

everybody's dancing, because I love to dance.

But when that happens I just remove myself so I can focus instead on what I can do. "

1. In which of the following places did Wesla Whitfield once work?

A. A college,      

B. A hospital.          

C. A pizza shop.    

D. A news agency.

2. Which of the following statements is TURE about Wesla Whitfield's physical disability?

A. It was caused by a traffic accident.

B. It made her sad and depressed at first.

C. It seriously affected her singing career.

D. It happened when she was a college student.

3. What do the underlined words "when that happens" mean in the last paragraph?

A. When Wesla is losing her mind.

B. When Wesla is singing on the stage.

C. When Wesla goes out in her wheelchair.

D. When Wesla sees other people dancing.

4. What advice would Wesla most likely give other disabled people?

A. Ignore what you have lost and make the best use of what you have.

B. Be modest and hard-working to earn respect from other people.

C. Acquire a skill so that you can still be successful and famous.

D. Try to sing whenever you feel upset and depressed.

下列何种降血糖药易引起乳酸血症（）

A.正规胰岛素

B.阿卡波糖

C.格列本脲

D.甲苯磺丁脲

E.苯乙双胍

清理楼面时，垃圾应（）

A、从窗口直接抛下

B、从阳台直接抛下

C、用封闭式容器运走