6. After the 8.8 magnitude quake, ___ large number of the injured are in ____hospital in Chile.
A. the, / B. a, the C. the, the D. a, /
5.breath A. please B. easily C .reader D. pleasant
第二节 语法和词汇知识(共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
例:We ____ last night, but we went to the concert instead.
A. must have studied B. might study C. should have studied D. would study
答案是C
4. official A. basic B. accept C. ancient D. musical
3. period A. material B. devote C. depend D. president
2.suggestion A. information B. question C. exhibition D. connection
第一节 语音知识(共5小题;每小题1分,满分5分)
从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项,并在答题卡上将该项涂黑。
例:A.gave B.save C.hat D.made 答案是 C。
1. character A. nature B. disaster C. match D. answer
22.(本小题满分12分)
数列{an}的前n项和为(∈N* ,为常数),且.
(Ⅰ)求p的值;
(Ⅱ) 求证:数列{an}是等差数列;
(III)将数列{an}的前n项随机打乱顺序得到数列{bn}的前n项,
试比较和的大小.
21.(本小题满分12分)
已知椭圆:的右焦点为, 过原点和轴不重合的直线与椭圆相交于两点. ,的最小值为.
(Ⅰ)求椭圆的方程;
(Ⅱ) 若直线与椭圆交于,以线段为直径的圆过的右顶点,求证直线过定点.
20.(本小题满分12分)
函数.
(Ⅰ)求的单调区间;
(Ⅱ) 求证:当时,不等式恒成立.
19.(本小题满分12分)
如图,在三棱锥中,已知,
,,,分别是的中点.
(Ⅰ)求证:直线⊥平面;
(Ⅱ)求二面角的大小.