对热工各连接管路应如何检查?
参考答案:
主要检查管路,即蒸汽、空气管路和水管路是否有接错、堵塞和泄漏现象。
The threestorey building, ________in the 18th century, was turned into a museum in 1960.[ ]
A. constructing
B. constructed
C. being constructed
D. when constructed
新生儿肺透明病的特点不包括()
A.病死率低
B.多见于早产儿
C.胃液振荡试验(泡沫稳定试验)阴性
D.肺X线可出现"白肺"和"支气管充气征"
E.一般在生后6小时内逐渐出现呼吸困难、青紫