在标准状况下，将aLNH₃完全溶于水得到VmL氨水，溶液的密度为ρg•cm^﹣3 ， 溶质的质量分数为ω，溶质的物质的量浓度为C mol/L．下列叙述中正确的有（　　）

①ω=×100%        

②C=

③上述溶液中加入VmL水后，所得溶液的质量分数大于0.5ω

④上述溶液中加入等质量的水后，所得溶液的物质的量浓度大于0.5C．

在三个密闭容器中分别充入氖气、氢气、氮气三种气体，当它们的温度和密度都相同时，这三种气体的压强（p）从大到小的顺序是（  ）

若矩阵满足a₁₁ ， a₁₂ ， a₂₁ ， a₂₂∈{﹣1，1}，则行列式不同取值个数为（　　）

已知矩阵 不存在逆矩阵，且非零特低值对应的一个特征向量 ，求 的值.

The factory is in charge of removing waste p.

阅读下面这首宋诗，完成下题。

木兰花慢

[元]张弘范①

功名归堕甑②，便拂袖，不须惊。且书剑蹉跎，林泉笑傲，诗酒飘零。人间事、良可笑，似长风、云影弄阴晴。莫泣穷途老泪，休怜儿女新亭。

浩歌一曲饭牛③声，天际暮烟冥。正百二山河，一时冠带，老却升平。英雄亦应无用，拟风尘、万里奋鹏程。谁忆青春富贵，为怜四海苍生。

[注]　①张弘范：元朝将领，善于马上舞槊，也能文。中统三年任行军总管。后被免去军职。其后又被起用，率兵灭宋。②甑：一种古代炊具，类似现在的蒸锅，多为陶制。③饭牛：喂牛。据《吕氏春秋·举难》记载，春秋时，宁戚因穷困无法得到举荐，于是为商人驾车到了齐国。遇桓公到郊外迎接客人，他“饭牛居车下，望桓公而悲，击牛角疾歌”，桓公听到后，认为他是个奇才，于是加以重用。

在下列各组物质中，分子数一定相同的是（   ）

设N_A表示阿伏加德罗常数的值，下列说法错误的是（   ）

下列化学用语不正确的是（   ）

已知矩阵A= ， 求|A|²﹣1的值．

—How is the weather in the city you are living?

—It is (多变的).

One of her s is her bad temper, which keeps her colleagues away from her.

根据键线式回答下列问题：

该物质的分子式为，结构简式为．

在同温同压下，a g气体A与b g气体B的分子数相同，下列说法中错误的是(   )

阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

    It's great to be part of a happy family. It is fun to be with people who like you. It is good to feel the1and the love of the ones who care for you. It is fantastic when you can2them when you have problems.

    3, it is also true that things are not always easy. Young people want to 4their own personality. Parents5think they know better. They find it6to accept that their son or daughter wants to think differently from how they used to think when they were7themselves. As a result, young people are often unhappy and believe their parents do not8them.

    Many of my friends would love to be9of their parents as soon as possible. They would love to have their own place where they can live the life they imagine must be10.They think that not having a11who tells them to tidy up their rooms or get up at a certain time must be paradise(天堂)。

    How would I12if I were asked whether I wanted to leave home? First of all, there is the financial(财务的) situation. Having your own flat costs a lot of13. Secondly, being completely14also means a lot of responsibility.15, I admit I like to be reminded of urgent (紧急的) things I have forgotten to do 16I would never admit that to my parents). And thirdly, if members of a family accept that everybody is an individual and needs a certain amount of17, life in a family can be great fun.

    18, I would not like to be on my own too soon. I would say that I am19living with my family for now and I can20.

假定英语课上老师要求同学之间交换修改作文，请你修改你同桌写的以下作文。文

中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（/\），并在该句下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    One of my favorite comedian is George Burns. George began to work in theaters in 1906. In 1923 he started a comedy team with a woman named Gracie, that later became his wife. They were both became big stars, first on the stage and then on radio and TV. However, when Gracie had to stop his work in 1958 because of illness, George nearly disappeared from view.

    Then in 1975, George won a Academy Award for his excellent performance in a film called “The Sunshine Boys”. Not had seen his previous work, millions of young men still became his fans. Everyone had great affection to this little man with a cigar. George stayed very actively when he was in his 90s. He even promised to give a special concert on his 100^th birthday. However, in 1994, he fall in the bathtub and hurt himself. After that, his health never recovered. In 1996, the news he passed away made millions of Americans sad.

My deskmate was caught(考试作弊) last week.

在两个密闭容器中，分别充有质量相同的甲、乙两种气体，若它们的温度和密度均相同，试根据甲、乙的摩尔质量（M）关系，判断下列说法正确的是（　　）

“In the beginning, there was only a very small amount of unfairness in the world, but everyone added a little ,always（think）that it was only small and not very important ,and look where we have ended up today.”

设N_A为阿伏加德罗常数的值，下列说法正确的是（   ）