加气混凝土制品砌筑或安装时的含水率宜小于()
A.30%
B.35%
C.40%
D.45%
参考答案:A
In order to keep healthy, you should eat _____ fast food and _____ fresh vegetables, and take enough exercise. [ ]
A. fewer; fewer
B. less; more
C. fewer; more
D. less; less
承载比试验适用于在规定的试筒内制件后的各种土和(路面基层、底基层)材料;试样的最大粒径宜控制在()。
A.在20mm以内,最大不得超过31.5mm
B.在25mm以内,最大不得超过40mm
C.在20mm以内,最大不得超过40mm
D.在25mm以内,最大不得超过31.5mm