在低瓦斯矿井开采煤层群和分层开采联合布置的采区专用回风巷内可以安设乘人器，但必须将机头电器设备布置于巷道的进风侧。
参考答案：错
Or are you afraid that your friend would laugh at you, or would not understand what you are ________?
A．looking through
B．looking at
C．going on
D．going through
会阴Ⅰ°裂伤指()会阴Ⅱ°裂伤指()会阴Ⅲ°裂伤指()
A．肛门括约肌部分断裂
B．会阴体肌肉裂伤延及 * * 侧沟
C．会阴皮肤粘膜裂伤
D． * * 壁血肿
E．宫颈9点处裂伤长3cm
