About one fourth of the families in the city have private cars and this number _____ to double in five years. A. is expecting B. has expected C. is expected D. will expect
若f(x)=(x-1)(x-2)(x-3)(x-4)(x-5),则f'(1)等于A.0 B.24
the situation become worse, call me at once. A. Must B. Need C. May D. Should
(本小题10分)已知某几何体的俯视图是如图所示的矩形,正视图是一个底边长为8、高为4的等腰三角形,侧视图是一个底边长为6、高为4的等腰三角形
某0.1 mol/L的NaHB强电解质溶液中,下列关系式一定正确的是 A.c(Na+)=c(HB-)+2c(B2-)+c(OH-) B.pH=1C.c(Na+)=0.1 mol/L≥c(B2-)
1892年,“现代奥林匹克之父”顾拜旦提出,现代奥运会应以“团结、和平和友谊”为宗旨。当时威胁这一主张是
Government officialsare______ people and they should____the people heart and soul. A. servants of; serve B.service for; serve C. servants of; serve for
如图是一个二次函数的图象,顶点是原点O,且过点A(2,1), (1)求出二次函数的表达式; (2)我们把横、纵坐标都为整数的点称为整点,请用整数