病侧呼吸动度减弱伴叩诊为浊音、呼吸音消失者，见于
A．肺实变 B．肺气肿 C．肺不张 D．气胸 E．胸膜增厚
参考答案：D
In relation to the Labour Contract Law of China:
(a) explain the circumstances in which a labour contract is not allowed to incorporate a provision of probation. (4 marks)
锅炉点火前，没有将炉膛内（）排除是造成炉膛爆炸的原因。
A、可燃气体
B、烟气
C、惰性气体
D、多余的空气
