普通水泥混凝土的养护时间为()天。
A.3
B.7
C.14
D.28
参考答案:D
钟表的轴心到分针针端的长为5cm,那么经过40分钟,分针针端转过的弧长是( )cm。
—This morning your mobile phone was always busy. I couldn’t ________ to you until several attempts.
—Oh, I’m sorry. I was discussing the price of our products with a client over the phone.
A.get over
B.get through
C.get across
D.get on