问题 不定项选择
不定项选择
单色光从真空射入玻璃时,它的(   )

A.波长变长,速度变小,光量子能量变小

B.波长变短,速度变大,光量子能量变大

C.波长变长,速度变大,光量子能量不变

D.波长变短,速度变小,光量子能量不变

答案

答案:D

阅读理解

Michelle , a famous lady , has found that over 25% students are too fat in her country . It’s a very serious problem . So she stats a health program to deal with it . The health program is to reduce(减少)the amount of fat students today and in the future .

The program will get families , schools , news papers , magazines and TVs to join together and deal with the students obesity so that students will be at a healthier weight . The program includes : Food stores should sell healthier foods . Schools should serve healthier meals with less fat and should also offer gym classes .

The lady is trying to fight the students’ obesity all over the country because it can cause illnesses and higher cost . She wants the students to eat right, exercise more and control their weight . She also wants the students to understand it is important to have less sweet food , and drink water , milk and fresh juices , but not to choose cokes .

The health program is really helpful to the students today and in the future . As she says , we can’t always build the future for our youth , but we can built youth for the future .

小题1:In Michelle’s country over         of the students are too fat .

A.75%

B.a quarter

C.a half

D.25%小题2:The word “obesity” in the second paragraph means “     ” in Chinese .

A.厌食症

B.抑郁症

C.肥胖症

D.强迫症小题3:What does the lady want the shops to do ?

A.To offer gym classes .

B.To plant a vegetable garden .

C.To serve meals with less fat .

D.To sell healthier foods .小题4:What is the main idea of the passage ?

A.The lady introduces health drinks .

B.The lady cares about food cost .

C.The lady fights obesity in students .

D.The lady feels worried about the height .

单项选择题