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听力原文：M: Hi. I have some good news for you. W: What is it? M: The teacher suggested that we go on a trip this Saturday. W: Oh, wonderful. Where shall we go? M: How about going to the park? W: I don't think it's a good place to go to. We can go there another time. We should go farther away this time. M: Where do you think we should go then? W: How about the reservoir in the suburbs? M: I don't think it's a good idea. It's not safe. Why not go to the mountain instead? W: That sounds good. Let's go to the mountains to the south of the city. (18)A.
A teacher and a student.
B.
Classmates.
C.
Father and daughter.
D.
Mother and son.
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【简答题】已知椭圆 x 2 a 2 + y 2 b 2 =1（a＞b＞0）和圆O：x 2 +y 2 =b 2 ，过椭圆上一点P引圆O的两条切线，切点分别为A，B．若∠APB=90°，则椭圆离心率e的取值范围是______．
【简答题】已知双曲线C： （a>b>0）和圆O：x 2 +y 2 =b 2 （其中原点O为圆心），过双曲线C上一点P（x 0 ，y 0 ）引圆O的两条切线，切点分别为A，B。 （1）若双曲线C上存在点P，使得∠APB=90°，求双曲线离心率e的取值范围； （2）求直线AB的方程； （3）求三角形OAB面积的最大值。
【简答题】教师应如何激发学生 阅读 的兴趣和动机? 2. 在初学者课堂,有哪些常见阅读 活动?教师应如何向学生介绍和解释这些活动?
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