已知点P（-3，2），点P关于x轴的对称点坐标为______．
根据平面直角坐标系中对称点的规律可知，点P（-3，2）关于x轴的对称点坐标为（-3，-2）．
My money_____. I must go to the bank to draw some of my savings out before I've none in hand. [ ]
A. has run out
B. is running out
C. has been run out
D. is being running out
将洋葱根尖细胞中的基因，染色体及细胞核作一比较，此三者关系为 [ ]
A．染色体＞细胞核＞基因
B．细胞核＞基因＞染色体
C．细胞核＞染色体＞基因
D．基因＞染色体＞细胞核
