小丽使用显微镜时，发现视野太暗，需调节。下列与调节明暗程度无关的是 A．反光镜

诊断依据是

A．呕吐

B．尿量600ml/天

C．眼球凹陷

D．皮肤干燥

E．血钠128mmol/L

Don’t you just love ice skating every winter？I am sure，that since winter is approaching，your skates are set to come out，just waiting to be used.Impress your friends with your new trick on how to ice­skate backwards with the help of these tips.Skating backwards on ice is a bit difficult but once you master the basic，there’s nothing like it.Follow the steps given below and you will be able to skate backwards in no time.

Stand Straight

The first thing that you need to do is，stand straight.If you feel that you are falling backwards，then just put your chin(下巴) up and slightly bend your knees.Don’t worry；this happens to all.

Confidence Is What You Need

The most important step while learning how to skate backwards，is having enough confidence in yourself and in what you are doing.How can you achieve this？By practice.Just practice rolling backwards down a gentle slop every single day or just by pushing off from a wall or something of that sort.But before you do that，make sure that the place where you are practicing is free from any kind of debris(碎片) because otherwise，you could land up in the hospital due to some accident.While going backwards，just get used to the feeling of moving backwards.One of the important ice skating tips and techniques is that if you feel that you are losing your balance，then scissor(做剪式运动) your skates.Keep practicing this till you are confident about it.

Maintain Speed

Confident now？Great！Now the next step is to maintain your speed.While rolling in a straight line with one skate，with the other try sculling(划桨)，that is，keep pushing yourself backwards with an outwards stroke(滑动)．Now bring the skate which you were using to scull，and then again，repeat the same process.Make sure that you put most of your weight on the skate which is moving straight and not the one with which you are sculling.Now，try the same thing using the other foot.Again keep doing this till you are confident enough.

Increase Your Speed Now

Once you are confident that you can scull with either foot，the next thing that you have to do is increase your speed.Try some of your own tricks now.Scull with either foot or with both at the same time.

Scull and Be Aware

While you keep one foot straight，keep sculling with the other.You can do that simultaneously with both feet.Concentrate on what you are doing but don’t get so involved，that you don’t see where you are going.If you are not watching your back，you might just bang against something or someone.

小题1:According to the text confidence comes from ______.

A．high speed

B．strict coaches

C．constant exercise

D．good techniques小题2:Which is the right order of ice­skating backwards?

a．Increasing your speed.

b．Being able to scull with one foot.

c．Being about to stand straight.

d．Trying some different tricks.

A．c→a→d→b

B．c→b→d→a

C．a→c→b→d

D．c→b→a→d小题3:In order to keep balance when skating backwards you should ________.

A．skate in a scissor gesture

B．use both your feet to scull

C．skate forward first and then backward

D．put most of your weight on the skate with which you are sculling小题4:The purpose of the text is ________.

A．to compare different ways of ice­skating backwards

B．to introduce the culture of ice­skating backwards

C．to explain advantages of ice­skating backwards

D．to offer some advice on ice­skating backwards

关于《孕妇和牛》，下列陈述正确的是()。

A.它表现了铁凝温婉的情怀、清澈纯净的诗情。

B.小说抓住日常生活的一个瞬间进行刻画。

C.小说对文明的人类社会发出了质询。

D.小说刻画了两个人物形象。

下面是有关当前宏观经济运行情况的一些资料：
[材料1]根据国家统计局公布的宏观经济运行情况，2007年上半年国内生产总值106768亿元，同比增长11.5%，比上年同期增加0.5个百分点。居民消费价格同比上涨3.2%(6月份同比上涨4.4%)，涨幅比上年同期上升1.9个百分点。食品价格同比上涨7.6%，其中，粮食上涨6.4%，蛋上涨27.9%，肉禽及其制品上涨20.7%。
[材料2]中国人民银行货币政策委员会2007年7月在北京召开2007年第二季度例会，认为应继续实施稳健的货币政策，稳中适度从紧。
[材料3]国务院决定自2007年8月15日起，将储蓄存款利息所得个人所得税的适用税率由现行的20%调减为5%。中国人民银行决定，自2007年7月21日起上调金融机构人民币存贷款基准利率。金融机构一年期存款基准利率上调0.27个百分点，由现行的3.06%提高到3.33%。
结合材料分析：

为什么实现国民经济又好又快发展必须加强和改善宏观调控？

牛轭湖形成于（）。

A.狭窄的山谷，那里沉积物易堵塞河谷从而形成湖泊

B.宽阔冲积平原区的曲流河

C.辫流河（汊流型河流）

D.很大的湖泊