静脉肾盂造影时（）首先显影。 A.肾实质 B.肾小盏 C.肾大盏 D.肾盂 E.输尿

细胞质是细胞结构的重要组成部分，下列有关细胞质功能的叙述错误的是[ ]

A．活细胞中细胞质是不断流动的，有利于物质运输

B．抑制线粒体的功能不会影响主动运输

C．细胞质基质是新陈代谢的主要场所

D．细胞质基质中也能产生ATP

As we all know, it was ____ that resulted in the terrible car accident. [ ]

A. because of her carelessness        

B. her being careless 

C. because she was careless          

D. she was so careless

治疗风热咳嗽，痰热咳嗽的药组是（）

A.前胡、浙贝母

B.瓜蒌、天竺黄

C.竹茹、桔梗

D.白前、荆芥

E.旋覆花、马兜铃

某校研究性学习小组用右图装置进行镁条在空气中燃烧的实验．先将镁条燃烧、冷却后打开止水夹，进入集气瓶中水的体积约占集气瓶体积的70%．

（1）如果镁条只和空气中的氧气反应，则进入集气瓶中水

的体积最多不超过其容积的______%．现进入集气瓶中水的

体积约为其容积的70%，根据空气的组成可推出减少的气

体中有氮气．

【发现问题】氮气是怎样减少的呢？

【假设一】氮气与镁条反应而减少．

【假设二】______．

【查阅资料】镁条在氮气中能燃烧，产物为氮化镁（Mg₃N₂）固体．氮化镁中氮元素的化合价为______．镁条还可以在二氧化碳气体中燃烧生成碳和氧化镁，该反应的化学方程式______．

（2）通过以上探究，你对燃烧的有关知识有了什么新的认识：______（写出一点即可）．

阅读理解。

     You are from a middle-class family, and live in a normal-size home without any showy possessions, but

you are worried that he will want to live as they do, and wonder if you should move.

     Sometimes big pocket money, joyful birthday parties, special playrooms and super-big houses tell you that

your neighbors probably have more money than you do, and that they're not as careful as you are with money,

but you may.

     Find that they cook and dig in the garden with their children just as often as you do, talk with them as freely

and read to them every night.

     Or you may find that some of these parents stay in one wing of their big house while their child plays by

himself, way off in a wing of his own. In that unfortunate case, he is basically growing up alone without being

looked after properly, but this can happen to a child who lives in a normal-size house, too, if he has a TV, a

computer and a few video games in his room. Even the most caring parent doesn't walk in and out of it to see

what show her child is watching, what Internet site he has found and if he's still playing that video game.

     Too much uncontrolled screen time may lead to a certain loss of innocence (天真), but mostly this child

will lose the sense of unity and satisfaction that comes from being in a family.

     A neighborhood should also provide you with a sense of unity and satisfaction, and if it doesn't, you might

decide to move. Don't judge your neighborhood too harshly (严厉地), though. There are some things that are

right with almost any neighborhood and some things that are wrong with the best of them-like those super-big

houses. The wealth of their owners-and the way they throw money around-may make your son feel sorry for

himself, unless you help him understand that you and his dad save some of the money, give some to people

who don't have enough and use the rest to pay for whatever the family needs.

     Children want-should be provided with-explanations when their parents don't give them what they want.

1. What is the problem with the worried parent in the text?

A. Her house isn't as big as her rich neighbors'.

B. Her son is left alone without anyone in charge.

C. She cannot provide her son with a special playroom.

D. She worried about the effect of her neighbors on her son.

2. In paragraphs 2 and 3, the author seems to agree that parents should _____.

A. spend more time with their children

B. give their children more freedom

C. work hard to lead a richer life

D. set an example for their children to follow

3. By saying "throw money around" (paragraph5), the author means that rich people ______.

A. spend money carelessly

B. save money for their children

C. help the poor people willingly

D. leave money all round the house

4. What is the main idea the author aims to express in the text?

A. Children are unfortunate to have poor parents.

B. Children should enjoy their comfortable life.

C. Children need proper guidance from their parents.

D. Children feel ashamed of themselves in a rich neighborhood.