在面板混凝土浇筑施工中应控制入槽混凝土的坍落度在3~6cm,振捣器应在滑模前( )处进行振捣。
A.40cm
B.50cm
C.60cm
D.70cm
参考答案:B
The oceans and seas ______ the islands are more or less polluted.
A.surrounding
B.surrounded
C.are surrounded by
D.are surrounding
竹叶石膏汤的治法是()。
A.辛寒清热
B.清热益气生津
C.清热和胃,益气生津
D.养阴清热生津
E.清热燥湿