二尖瓣关闭不全
A.第一心音增强B.心牢小于脉率C.心室律绝对不规则D.心尖部3/6级收缩期杂音
参考答案:D
I wonder why you didn’t do as ________ and it’s the third time you have done this.
A.telling
B.be told
C.told to
D.tell
火场中浓烟滚滚、视线不清呛得你喘不来气时,()方法逃离。
A.迅速跑出
B.蹲下或爬在地面上逃离
C.披着棉被逃离