问题 单项选择题 A1/A2型题

在运动前,适当补给糖,有利于运动中维持血糖水平,一般在比赛前适宜的服糖量是()。

A.4.5g/kg体重

B.0.5g/kg体重

C.3.0g/kg体重

D.1.0g/kg体重

E.5.0g/kg体重

答案

参考答案:D

解析:为维持运动中的血糖浓度和能量供应,运动员一般在赛前可按1.0g/kg体重补充糖类。

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Big schoolbags have been a serious problem for students for a long time. Maybe your schoolbag is too         to carry, and it troubles you a lot        you want to find a book out to read. Now an e-­textbook will         you.

It is said that e-textbooks are going to be        in Chinese middle schools. An e­-textbook, in fact, is a small          for students. It is much        than a usual schoolbag and easy to carry. Though it is as small as a book, it can       all the materials (材料) for study. The students can read the text page by page on the        , take notes with the pointer (屏写笔). Or even “        ” their homework to their teachers by sending e­mails. All they have to do is to press a button.

Some people say e-­textbooks are good, but some say they may be        for the students' eyes. What do you think of it?

小题1:A. light             B. heavy        C. useful        

小题2:A. till              B. after            C. when

小题3:A. trouble           B. prevent       C. help    

小题4:A. used              B. kept             C. invented 

小题5:A. computer          B. radio            C. pen      

小题6:A. heavier           B. lighter          C. cheaper      

小题7:A. hold              B. build            C. discover     

小题8:A. blackboard            B. desk           C. screen       

小题9:A. find out          B. hand in          C. get back     

小题10:A. helpful              B. famous       C. bad