作为主要建筑材料的混凝土具有材料丰富和()等优点。
A、弹性和塑性好
B、脆性和抗弯性能好
C、导热性能高
D、价格较金属、木材和塑料便宜
参考答案:D
I have nothing to confess. ____ you want me to say?[ ]
A. What is it that
B. What it is that
C. How is it that
D. How it is that
简述国家预算的含义及其类别。