搜题请搜索小程序“爱下问搜题”
问题 单项选择题

职业健康安全危险源是（）

A.可能导致伤害或疾病、财产损失、工作环境破坏或这些情况组合的根源或状态

B.污染环境的风险

C.造成死亡、疾病、伤害、损坏或其他损失的意外情况

D.A+C

答案

参考答案：A

名词解释

系统原理
查看答案
单项选择题

Kim bought a total of $2.65 worth of postage stamps in four denominations. If she bought an equal number of 5-cent and 25-cent stamps and twice as many 10-cent stamps as 5-cent stamps, what is the least number of 1-cent stamps she could have bought ？（）

A．5

B．10

C．15

D．20

E．25
查看答案