能确诊支气管扩张的检查是
A．胸部X光片B．支气管造影C．痰菌培养D．结核菌素试验E．痰脱落细胞检查
参考答案：B
The civil war broke out in Libya, ______ to the instability of the international oil price．
A．to contribute
B．contributed
C．having contributed
D．contributing
行驶胶轮车巷道瓦斯浓度超过（）%，必须停止运行并熄火
A、1
B、1.5
C、2
D、2.5
