多绳摩擦式罐笼提升系统中关于防坠器的说法正确的是()。
A.必须装设
B.禁止装设
C.不需要装设
参考答案:C
《中华人民共和国职业病防治法》规定:用人单位应依法参加()保险。
The children made so much noise that the teacher ____them and shouted" Be quiet "
A.glanced at
B.stare at
C.looked at
D.glared at