Generally it isnt harmful to our ears, when sounds are up to______.
A. 140 decibels
B. 100 decibels
C. 80 decibels
D. 160 decibels
查看答案
AotuCAD软件常用的菜单有()。
A绘图
B屏幕
C光标
D图标
According to the passage, the focus of young college students concerns about health is mainly on
A. their present health condition.
B. their future health.
C. how to take care of themselves after retirement.
D. how long they are going to live.
Whats the necessary part of a Halloween party？
A. Scary stories.
B. Fairy tales.
C. Jokes.
D. Lectures.
According to Verity, why is the toothpaste never green？
A. Because green products are regarded to be a bit disgusting.
Because green products are hard to be recognized.
C. Because green products are not respected by most people.
D. Because green products are not designed by color industries.
微信支付 
支付宝支付