混凝土的水化作用要求有适宜的温度和湿度，这是构成养护混凝土的主要原因。( )
参考答案：对
坐潭上，四面竹树环合，寂寥无人，（）。以其境过清，不可久居，乃记之而去。
Speaker A: I wish you wouldn't have your TV so loud.Speaker B: ______
A．I think so too. I will follow your advice.
B．Sorry! Were you trying to sleep
C．Yes, I'm terribly sorry. I didn't mean to disturb your study.
D．All right. I will turn it down.
