危险化学品要在包装标签上印有警示性标志。酒精应选用的标志是
答案:C
酒精为易燃液体,故其标志为C
—Does your Chinese teacher a big nose?
—No, he a small one.[ ]
A. has; have
B. is, has
C. has; has
D. have; has
安检人实行()准入制度。
A、职业道德工
B、职业技能
C、职业资格
D、资历