奇脉常见于下列疾病()
A．冠心病
B．心肌炎
C．心肌病
D．心包腔积液
E．缩窄性心包炎
参考答案：D, E
We have read for an hour. Now let's stop ____a rest. [ ]
A. had
B. have
C. to have
D. having
A．推广使用以氢氧燃料电池提供动力的客车
B．综合利用石化能源
C．在田野里大量焚烧桔杆
D．随手关闭电源开关，关紧水龙头
or an hour. Now let's stop ____a rest. [ ]