采用隔日疗法应用糖皮质激素的目的是A．用药方便，经济 B．防止诱发或加重感染 C．与

下面图甲是“发达国家和发展中国家城乡人口比重的变化情况图”，图乙是“世界人口增长情况图”。

读图，完成（1）——（3）题。

（1）图甲中，代表发达国家城市人口的是[ ]

    A、①

    B、②

    C、③

    D、④

（2）从1980年至2000年，发展中国家乡村人口数量[ ]

    A、增加了约13亿

    B、增加了约3亿

    C、减少了约13亿

    D、减少了约3亿

（3）下列各类人口，当前机械增长率最高的是[ ]

    A、发达国家城市人口

    B、发达国家乡村人口

    C、发展中国家城市人口

    D、发展中国家乡村人口

继神秘的火星之后，土星也成了世界关注的焦点．经过近7年时间，2亿千米在太空中风尘仆仆的穿行后，美航天局和欧航天局合作研究出“卡西尼”号土星探测器于美国东部时间6月30日（北京时间7月1日）抵达预定轨道，开始“拜访”土星及其卫星家族．这是人类首次针对土星及其31颗已知卫星最详尽的探测．若“卡西尼”号土星探测器进入土星飞行的轨道，在离土星表面高h的圆形轨道上绕土星飞行，环绕n周飞行时间为t，求

（1）土星的质量；

（2）忽略土星自转的影响，求土星表面的重力加速度．

在图中为A、B两组照片，仔细观察照片，回答下列问题。

（1）根据A中的照片你能否判断飞机与汽车哪个在运动？

（2）根据B中的照片你能否判断飞机与汽车哪个在运动？

（3）由（1）（2）你能得出怎样的结论？

蟋蟀的“耳朵”长在（）

A、头顶上

B、前足的小腿节上

C、触须上

D、翅膀上

阅读理解

    No fight can end, and no friendship can move on, until everyone says these little words:I'm sorry.

Sometimes, though, they can be difficult to say.__1__

    It's not about winning.

    Friendships aren't like the Super Bowl, and there should never be a winner and a loser. When you

start fighting with a friend, it may feel important that you "win" the fight by proving you're right and he is

wrong, or by making him be the first to apologize.__2__

    You may have heard the expression "His pride stood in the way." It is usually used to describe a

person who is so determined to be "right" that he lets an opportunity for happiness pass him by forever.

__3__Remember:as time goes on, we usually forget who was right and who was wrong in a disagreement, and only remember the sadness of losing a friend.

    Take the first step.

    Are you sick of fighting?Do you think this fight is just not important enough to ruin your friendship?

__4__You don't have to take full responsibility for starting the fight, or even say that your feelings were

wrong. But you should find something you did or said that's worth apologizing for. Maybe you're sorry

that you let the fight go for so long, of that you overreacted(反应过度的) to something your friend did.

If you say you are sorry, it's like an invitation for your friend to do the same.__5__

A. Then try to be the first to apologize.

B. Stop thinking about your pride.

C. It's about taking some responsibility for the argument.

D. Don't let this happen to a friendship you care about.

E. Here are some things to keep in mind.

F. There are some special cases when you shouldn't be the one to apologize first.

G. Once you've both said it, you'll both feel a million times better.