儿童时期引起心力衰竭最为多见的病因是()
A.急性肾炎
B.风湿性心脏病
C.先天性心脏病
D.病毒性心肌炎
E.营养不良
参考答案:A, B
在急性肝炎时,哪一项LDH同工酶活性增高()
A.LDH1
B.LDH2
C.LDH3
D.LDH4
E.LDH5
—_____ your Chinese teacher very friendly?
—Yes, _____. [ ]
A. Are; he is
B. Is; she is
C. Are; she is
D. Are; they are