问题 单项选择题

不需要拔除的乳牙是()

A.乳牙滞留、影响恒牙正常萌出

B.乳牙龋坏、根尖外露造成口腔溃疡

C.乳牙不松动、恒牙先天缺失

D.乳牙为残根、牙根有瘘管

E.乳切牙唇侧位、恒切牙已舌侧萌出

答案

参考答案:C

阅读理解

阅读理解。

     In 1983, Jackie Joyner took part in the world track and field championships in Helsinki, Finland. Her first

chance to be a world champion ended in disaster, however, when she got injured and could not complete the

heptathlon (七项全能). Her brother Al was also present, and he too was injured. Al Joyner said to his sister, "lt's

just not our time yet."

      One year later, both Jackie and Al Joyner joined the U. S. Olympic team. Having recovered from her

injuries, Jackie was a favorite to win the heptathlon. Al, on the other hand, was not considered likely to win his

event, the triple jump (三级跳). Surprisingly, Jackie won the silver medal in the heptathlon, missing the gold by

only 0. 06 seconds in her final event, the 800-meter run. But Al Joyner became the first American in 80 years

to win the Olympic triple jump. The tears running down Jackie's face at the end of the day were not for her

hair's breadth loss (毫厘之间的失败), but rather for the joy at her brother's success. The brother knew that

Jackie would be back to compete another day.

     In 1985,Jackie Joyner set a U. S. record with a long jump of 23 feet 9 inches. At that time she was under

the guidance of Bob Kersee. Their relationship changed after years spent working together as friends, and they

got married on January 11,1986. When Al Joyner married an athlete named Florence Griffith, the stage was set

for the emergence (出现) of a track and field family of champions. Both the women were coached (指导) by

Bob Kersee in preparation for the 1988 Seoul Olympic Games.

     At the 1988 Olympics, Jackie Joyner-Kersee not only won the gold medal in the heptathlon, but also took

the gold medal in the long jump. Florence Griffith Joyner's performance was also exciting. She won three gold

medals at the Olympic Games in the 100,200 and 4×100 meters relay.

1. By saying "It's just not our time yet", Al wanted to tell Jackie ______.

A. to be careful

B. not to be nervous

C. not to give up

D. to stop doing sports

2. From Paragraph 2,we learn people thought that ______.

A. Jackie would win the Olympic heptathlon

B. Al would win the Olympic triple jump

C. both Jackie and Al would win a gold medal

D. neither Jackie nor Al would win a gold medal

3. What do we learn about Jackie from the passage?

A. She first became a world champion in 1983.

B. She won a gold medal at the 1984 Olympics.

C. She set a long jump world record in 1985.

D. She won two Olympic gold medals in 1988.

4. What is the passage mainly about?

A. The world track and field championships.

B. Jackie and her family of champions.

C. The events and rules of the heptathlon.

D. The greatest sports stars in the U. S.

选择题