需要进行结垢量评级锅炉受热面包括省煤器、水冷壁、过热器和再热器()
参考答案:错
Mr. Lee is ________ teacher. ________ is from China.
A.his; He
B.he; She
C.his; It
D.my; His
最有利于脑外肿瘤定位的CT表现为
A.边界不清楚B.脑皮质受压内移C.明显增强D.中线移位E.颅骨变薄