问题 填空题

用弹簧秤称物体,称2千克的物体,弹簧长12.5厘米;称6千克的物体,弹簧长13.5厘米.没有称物体时,弹簧长______厘米.

答案

12.5-(13.5-12.5)÷(6-2)×2,

=12.5-1÷4×2,

=12.5-0.5,

=12(厘米);

答:弹簧长12厘米.

故答案为:12.

完形填空

"Eyes are windows of the soul." Everyone knows the    of the eyes.     more and more students are becoming near-sighted(近视). So how to protect the eyes is still a serious problem. Here is some advice on        protect your eyesight(视力).

You should not keep your eyes     for a long time. When reading, you should keep the books about a foot away from you. After reading for an hour     two, you’d better have a     by looking into the distance(远处).

You must remember not to read in dark light or in     , not to read on a moving bus or in bed. Doing eye exercises will help       to protect your eyesight.

In a       , to keep    eyesight, we must have good studying habits.

小题1:A. importance          B. experience              C. difference

小题2:A. So                 B. Because                C. But

小题3:A. what to             B. how to                 C. when to

小题4:A. working[            B. walking                C. waking

小题5:A. and                B. or                     C. as

小题6:A. talk                B. rest                    C. by

小题7:A. the earth            B. the star                 C. the sun

小题8:A. him                B. us                     C. you[

小题9:A. word               B. sentence                C. letter

小题10: A. bad                B. good                   C. weak

单项选择题