哪个属于工业废水的监测项目()。A、挥发酚 B、氨氮 C、总磷 D、余氯

题型:单项选择题

问题:

哪个属于工业废水的监测项目()。

A、挥发酚

B、氨氮

C、总磷

D、余氯

考点:水环境监测工水环境监测工题库
题型:单项选择题

下列说法中,不正确的是(  )

A.根冠是保护组织,生长点是分生组织

B.根毛吸收的水分和无机盐,通过根中的导管输送到植物的茎、叶和果实中去

C.生长点的细胞体积大,形状不规则,细胞壁薄,细胞核大

D.根毛区以上的部分,根毛脱落,失去了吸水功能,但加强了输导水分和无机盐的功能

题型:单项选择题

阅读理解

     As I was reading a recent story in Slate on 20somethings complaining about how the economy was

ruining their life plans,I couldn't help but think the 20somethings sounded like a bunch of spoiled children

who grew up expecting everything to be easy for them.As a 20something myself,I certainly share their

disappointment:My husband and I probably won't be able to buy a house until we're in our 40s,and we

too are burdened by student loans (贷款).But why should it be any different? Being young persons in 

America,shouldn't they take up all of the challenges and opportunities that this country offers?

     Consider some of these views shared in the Slate story: Jennifer,29,owner of a twobedroom apartment

with her husband,worries that she won't be able to have children for at least a decade because they can't

afford to buy a house yet.

     I read that,and I thought,what planet is she living on where you need to own a house in order to have

kids? Has she ever visited a developing country,or even downtown areas in this one? Home ownership is

a luxury (奢侈品),not a fertility requirement.

     A 26yearold in the story despairs (绝望) that he can't afford to get a Ph.D.in literature.Well,that sounds

a bit like expressing disappointment that no one will pay you to write poetry on the beach in Thailand for

five years.

     Yes,it's sad that these young people feel so lost.But I think the problem is their extremely high

expectations,not economic reality.Beth Kobliner,author of Get a Financial Life:Personal Finance in Your

Twenties and Thirties,says that she thinks people's expectations are slowly adjusting,but today's 20

somethings grew up at a time when everyone's wealth appeared to be expanding.Their parents probably

saw their home values rise along with their investments."So you have people who have grown up in an

environment where people had great expectations of what living well means," says Kobliner.

     This recession (衰退) will certainly play a role in forcing those expectations into more realistic group.

In the meantime,it seems a lot better for our mental health to focus on being grateful-for our onebedroom

apartments,for living in modern cities,or perhaps just for being able to eat three meals a day-than on

longing for some kind of luxury life.

1.What makes the author think the 20somethings sound like a bunch of spoiled children?

A.They expect everything to be easy for them.

B.They complain that the economy is spoiling their life plans.

C.They are reluctant to face all of the challenges.

D.They are burdened by student loans.

2.The underlined word "fertility" in Paragraph 3 probably means ________.

A.baby production  

B.pleasant

C.baby comfort  

D.essential

3.Which of the following is NOT one of the complaints of the 20somethings?

A.They can't have children for at least a decade to buy a house.

B.They have only onebedroom apartment to live in.

C.They can't buy a house until 40 because of student loans.

D.They despair at not being able to afford a Ph.D.in literature.

4.What's the author's attitude towards the 20somethings with high expectations in Paragraph 5?

A.Intolerant.  

B.Negative.

C.Unbelieving.  

D.Understanding.

5.What is the BEST title for this passage?

A.How Young People Afford to Continue Their Study

B.Why Young People Can't Afford to Buy a House

C.When Young People's High Hopes Create Despair

D.What the 20somethings' High Expectations Are

题型:单项选择题

自行车是我们熟悉的交通工具,从自行车的结构和使用来看,它涉及到不少有关摩擦的知识,例如:

A、轮胎上有花纹;

B、车轮做成圆形;

C、塑料套紧紧套在车把上;

D、在转动部分加润滑油;

E、脚踏板凹凸不平;

F、刹车时用力捏闸;

G、车轴处装有滚珠;

H、车把上有凹槽。

(1)上述各项内容中,属于通过改变接触面的粗糙程度而增大摩擦的是                  ;通过增大压力而增大摩擦的是                    ;通过变滑动为滚动而减小摩擦的是                    ;通过使接触面彼此分离而减小摩擦的是                   。(只填写各选项的字母)

(2)用力踩脚踏板使自行车前进时,后轮与地面间的摩擦力的方向朝               。(填“前”或“后”)

题型:单项选择题

下列分子中,具有极性键的非极性分子是

A.CO2

B.SO2

C.NH3

D.H2O

题型:单项选择题

要求创立于两千多年前的二十四节气,至今依旧能与各地气候一一对应,既苛刻也不符合自然之本。首先,当时中原地区的气候比现在温暖湿润得多;其次,不同纬度、高度,沿海还是内陆等等,都是造成气候差异的因素。所以诗人白居易游庐山大林寺,才会写下这样的诗句:“【甲】。”二十四节气的确立,有天文、气象、物候的根据。所谓天文,即依太阳在黄道上的位置来划分。将太阳从黄经零度——此刻太阳垂直照射赤道——设为起点,每前进15度为一个节气。运行一周360度,一回归年,正好为24个节气。因此24个节气,准确反映了太阳照射地球的角度,也准确反映了四季的变化。其中8个节气的名称,春秋“两分”,冬夏“两至”,春夏秋冬“四立”,就是这样确立的。而其余节气,则围绕如何指导农事而定。当时的农业生产主要是看天吃饭,于是二十四节气反映了气温变化,如大暑、小暑、处暑、小寒、大寒;反映了降水情况,如雨水、谷雨、小雪、大雪;反映作物的成熟和收成时机,如小满、芒种;还反映了物候现象,如惊蛰。当基本的气候现象、规律被二十四节气描绘、总结出来、成为阴历的补充后,农民即可依历而行。不过中国地域广大,南北有差异,东西各不同,根据什么调整呢?物候。动植物、生物是最好的老师,它们会随气候、气温的变化,而有相应表现。花开、燕来、蝉蜕壳,都有时间表。陆游诗里对此有点睛之句:“【乙】”。二十四节气是大自然的语言,中国人善于遵从自然之令,来调整生产生活。日久天长,这些经验被沉淀、总结下来后,就形成了纷繁多样的月令、农谚、民俗、民谚,世代传承,规范、指导着中国人的生活。如“【丙】”。柿子有润燥止咳的作用,因此霜降吃柿子防感冒一说,并非无稽之谈。只是传到后来,被神话了。其实其本意是:在特定的季节吃相应的食物,效果最佳。在合适的时间做合适的事,不违背天时,是中国人顺应自然的哲学观的体现。与此相似的习俗,可谓林林总总。诸如立春吃春卷,立秋贴秋膘。一年365天,因为有了二十四节气,也不再是机械、冰冷的阿拉伯数字,每过15天,生活这个舞台的背景就会被更换一回,那是鸟飞鱼跃,绿满窗前,天心月圆。我想起杜甫的诗:“【丁】”。倘若没有二十四节气,杜甫也就无感而生了吧。但是实事求是地说,随着全球气候变化,二十四节气的特征已不很明显,今天我们应该如何看待二十四节气?是相信它是灵丹妙药,还是视其为糟粕?

根据下列各句内容,请分别选择填入文中【甲】【乙】【丙】【丁】四处。()

①春分有雨家家忙,先种瓜豆后插秧

②人间四月芳菲尽,山寺桃花正盛开

③露从今夜白,月是故乡明

④野人无历日,鸟啼知四时

A.④②①③

B.②④①③

C.④①③②

D.①③②④

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