心房纤颤发生后可使心排血量下降
A．35%以上B．30%以上C．25%以上D．20%以上E．15%以上
参考答案：C
The medicine may help with your illness, but it may make you _____ , so you must be careful not to drive a car after taking such a medicine.
A．healthy
B．strange
C．tired
D．Bored
Ⅲ级屋面防水，设防道数为一道设防，选用高聚物改性沥青防水卷材时，其厚度不应小于3mm。( )
