完井液应具有（）。
A、盐性
B、抗钙性
C、抗湿性
D、防腐性
参考答案：D
This passage has too many long sentences. I’m afraid they will be hard for most of the students. Could you help to _______ them?
A．simplify
B．take
C．destroy
D．mix
提出当代革命军人核心价值观的领导人是（）。
A.毛 * *
B.邓 * *
C.江 * *
D.胡 * *
