问题
单项选择题
石灰土作为垫层是使用最广泛的材料之一，它是采用生石灰(含钙量＞70%)和黏土或亚黏土，按( )，经洒水、搅拌、闷料、碾压后结成板体。
A．百分比
B．体积比
C．重量比
D．一定比例
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
石灰土作为垫层是使用最广泛的材料之一，它是采用生石灰(含钙量＞70%)和黏土或亚黏土，按( )，经洒水、搅拌、闷料、碾压后结成板体。
A．百分比
B．体积比
C．重量比
D．一定比例
参考答案：C
| 完形填空。 | |||
| I know a black boy called l . His father is a farm worker. He works in a big 2 in the middle of America. Tom's parents work hard for the family day and night,but they get _ 3 money. So they are _ 4 . Tom_5 a younger brother, Jack and a younger sister, Su-san. The family need Tom's help. On weekends Tom 6 play in the park with other 7 . He has 8 at home to look after his sister, or help his parents 9 their work. Tom is such a twelve-year-old boy. Tom knows China," How happy the 10 children are ! " He often says, "I like this country very much, I will go there one day. " | |||
| ( )1. A. Mary ( )2. A. library ( )3. A. much ( )4. A. rich ( )5. A. has ( )6. A. can ( )7. A. children ( )8. A. to study ( )9. A. in ( )10.A. Chinese | B. Tom B. hospital B. many B. poor B. have B. can't B. child B. to play B. on B. Japanese | C. Jack C. school C. a little C. old C. is C. must C. friend C. to work C. with C. American | D. Susan D. farm D. little D. young D. there is D. only D. classmate D. to stay D. for D. English |