普通混凝土小型空心砌块最小外壁厚应不小于()。
A.15mm
B.20mm
C.25mm
D.30mm
参考答案:D
利用04法计算得到下列指标B的权重值为()。
A.0.21
B.0.29
C.0.25
D.0.17
——Bill had nothing for breakfast this morning , ?.
—— , he got up too late.
A.didn’t he ; No
B.did he ; No
C.hadn’t he ;Yes
D.Had he ;Yes