大于0.6而小于0.9的小数只有两个．______．（判断对错）
大于0.6而小于0.9的小数有无数个．
故答案为：×．
Though most people know that smoking ________ the risk of cancer,it is still hard for them to give it up.[ ]
A. multiplies
B. adds
C. combines
D. gains
用漂白粉处理肝炎患者粪便的比例应是
A．1:2B．1:5C．2:5D．1:3E．2:1
