未采取防锈措施的预应力筋，当空气湿度大于70%或盐分过大时，在安装后至压浆时的容许间隙时间为（）。
A.5d
B.7d
C.10d
参考答案：C
I met Jane while I ______ in the street last Monday. We ______ each other for three years. [ ]
A. worked, didn't see
B. worked, don't see
C. was walking, haven't seen
D. was walking, hadn't seen
对总体规划进行( )必须报同级人民代表大会常务委员会和原批准机关备案。
A．重大修改
B．局部调整
C．较大修改
D．原则变更
