A:水玻璃可用于生产黏合剂和防火剂
B:误服重金属盐,立即服用牛奶或豆浆可解毒
C:油脂、乙酸乙酯都属于酯类,但不是同系物
D:蔗糖、淀粉、纤维素水解的最终产物都只是葡萄糖
一位中学生双脚站立在水平地面上,
It's generous __ ___ them to donate money to UNICEF. They think it important _____ them to help poor children go to school.
如图,一次函数y=-2x+b的图象与反比例函数 y=kx 的图象交于点A(1,6)、B(3,2)两点.b的值为( )