问题 不定项选择

下图是科学史上一张著名的实验照片,显示一个带电粒子在云室中穿过某种金属板运动的径迹,云室放置在匀强磁场中,磁场方向垂直照片向里。云室中横放的金属板对粒子的运动起阻碍作用,分析此径迹可知粒子

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A.带正电,由下往上运动

B.带正电,由上往下运动

C.带负电,由上往下运动

D.带负电,由下往上运动

答案

A

阅读理解

Steve knew he'd been adopted as a baby, and when he turned 18, in 2003, he decided he'd try to track down his birth mother. The agency from which he'd been adopted gave him his mother's name: Tallady. But online searches didn't turn up any results about it, and Steve had to let it go.

In 2007, though, he searched for the name again online. This time, the search results included a home address near the Lowe's store where Steve, then 22, worked as a deliveryman. When he mentioned the coincidence to his boss, his boss said, “You mean Tallady, who works here?”

Steve and Tallady, a cashier, had said hello to each other a few times at the store, but they'd never really talked. He hadn't even known her name. Steve thought there was no possible way she was his mother though they shared the same name. For a few months, Steve avoided Tallady. “I wasn't sure how to approach her,” he told a local reporter. Finally, the agency volunteered to arrange their reunion.

When Tallady realized that the nice guy she'd been waving at was his son, she sobbed. She'd always hoped to meet her birth son one day. Later that day, mother and son talked for almost three hours at a nearby bar. She'd given him up for adoption in 1985, when she was 23. “I wasn't ready to be a mother,” she told him. Married with two other children, Tallady says, “I have a complete family now.”

小题1:Steve gave up the on­line search for his birth mother in 2003 because ________.

A.the agency didn't give him any help

B.there was no information about his mother

C.his mother didn't turn up online

D.he missed the information about his mother小题2:.What did Steve find about his mother online in 2007?

A.Her home address.

B.Her full name.

C.Her boss's name.

D.Her new job.小题3:Why Steve avoided Tallady for months?

A.Because she didn't want to talk to him.

B.Because he wasn't fully prepared for the reunion.

C.Because she was very difficult to approach.

D.Because he didn't think she was his birth mother.小题4:The best title for the text is ________.

A.The Love of Mother

B.An Unexpected Meeting

C.The Power of the Internet

D.An Unusual Reunion

单项选择题