一般民用建筑中属于承重构件的是（）。
A．基础
B．柱
C．楼梯
D．以上都是
参考答案：D
任何人只要客观实施了对社会有危害性的行为，就构成违法。 ( )
Do you know ______ your parents are pleased ______ you’ve done?
A．why; for what
B．how; with what
C．that; with which
D．how; for what
