体循环或肺循环出现栓塞频率较高的是（）
A.肥厚型心肌病
B.酒精性心肌病
C.扩张型心肌病
D.围生期心肌病
E.病毒性心肌炎
参考答案：D
John put his wallet into the microwave oven _________. [ ]
A. for keeping safe
B. for the safety
C. to be safe keeping
D. to keep it safe
钢材热加工时钢的最高加热温度应为（）℃。
A.750
B.950
C.1100
