不得使用（）拌制高性能混凝土。
A.自来水
B.井水
C.海水
D.处理过的工业水
参考答案：C
33. A series of programs and the development of local and nationwide health care networks are signs___ the government is serious about health care.
A．that
B．which
C．whether
D．What
社会两难情景
