Why are some scientists interested in studying aging problem？
A. They want to increase the general ability of our bodies．
B. They may be able to find a better way of our life．
C. If they can pin down the biochemical process that makes us age,there will be hope for extending the length of life．
D. They want to find out ifthere is a link between how efficiently a cell could repair itself and how long a creature lives．
查看答案
得分最低的学生是哪项？
A. 男生
B. 女生
C. 高年级学生
D. 不能确定
60分以下的学生有多少人？
A. 3人
B. 4人
C. 7人
D. 11人
哪一个分数段的学生最多？
A. 95～100
B. 75～80
C. 70～75
D. 60～65
Which of the following statements is TRUE according to the passage？
A. The present building of the White House has been standing for almost two centuries.
B. It was James Hoban who first got the idea of building the White House.
C. The number of the rooms in the White House has been growing ever since it was built.
D. The White House got its name at the turn of the century.
微信支付 
支付宝支付