The rich man gave away 5 _____ his money to charity to help the poor children in Africa. A. millions B. million C. millions of D. million of
设数列{an}是公差不为零的等差数列，Sn是数列{an}的前n项和，且S32=9S2,S4=4S2,求数列{an}的通项公式.
President John Kennedy was a reader and writer．President Lyndon Johnson was a listener．President Johnson didn’t do as well as he could in the White House because he thought he had to follow Kenn
下列说法正确的是（ ） A．同主族非金属元素的简单阴离子的还原性越强，其元素非金属性越强 B．ⅠA族与ⅦA族元素间可形成共价化合物或离子化
标准状况下，某同学向100mL H2S饱和溶液中通入SO2，所得溶液pH变化如图所示．下列分析中正确的是（ ） A．b点对应的溶液导电性最强 B．亚硫酸是比氢
Meals in Spain are quite different from ____ they have in China. A. which B. what C. that D. whom
已知关于的不等式组的整数解只有，则实数的取值范围为 ．
=8 
