混凝土的( )包括抗渗性、抗冻性、耐磨性及抗侵蚀性等。
A．干缩性
B．和易性
C．耐久性
D．密实性
参考答案：C
— What a beautiful skirt you are dressed in today! Where did you buy it?
— ______ ; I bought it in Beijing.
A．Not beautiful at all
B．Don’t mention it
C．It is very kind of you to say so
D．You’re welcome
重症肺炎可出现的并发症有
A．中毒性脑病
B．心力衰竭
C．心律紊乱
D．中毒性肠麻痹
E．脓胸
