问题
单项选择题
混凝土灌注在特殊情况下间歇时间不超过()。
A、60min
B、90min
C、120min
D、150min
答案
参考答案:C
混凝土灌注在特殊情况下间歇时间不超过()。
A、60min
B、90min
C、120min
D、150min
参考答案:C
Tom and Gina usually go to school by car .They drive(驾车) pasta cinema a supermarket a post office. The post office is next to the supermarket on Center Street .Mary and Ann usually go to school by bus. They go down Sixth Avenue, past a bank and a library. The bank is across from the library. Jenny usually goes to work by bike,he rides(骑车) past a hotel and three streets.
|