浓缩蜜丸所含水分不得超过()
A.5.0%
B.9.0%
C.12.0%
D.15.0%
E.20.0%
参考答案:D
By the time she’s twenty , she __ almost everywhere in the world!
A.will be
B.would have been
C.will have been
D.would be
受弯构件减小受力裂缝宽度最有效的措施之一是()。
A.增加钢筋直径
B.增加截面尺寸
C.提高混凝土的强度等级
D.增加受拉钢筋截面面积,减小裂缝截面的钢筋应力