“绿色化学”是21世纪化学发展的主导方面。“绿色化学”要求从根本上消除污染,包括“绿

题型:单项选择题

问题:

“绿色化学”是21世纪化学发展的主导方面。“绿色化学”要求从根本上消除污染,包括“绿色生产”和“绿色销毁”等内容。以下做法属于“绿色化学”的是。()

A.将垃圾废物浇上汽油焚烧

B.开发风能、太阳能等新能源

C.让工业废水直接排入江河中

D.杜绝污染源

考点:高校实验室安全考试化学化学题库
题型:单项选择题

一摆长为L的单摆,在悬点正下方(L-L′)的P处有一钉子,如图9-4-6所示,这个单摆的周期是(两边摆角均很小)(   )

图9-4-6

A.T=2π

B.T=2π

C.T=2π(+ )

D.T=π(+)

题型:单项选择题

All students need to have good study habits. When you have good study habits, you can learn things quickly. You can also remember them easily.

Do you like to study in the living –room? This is not a good place because it is usually too noisy. You need to study in a quite place, like your bedroom. A quiet place will help you only think about one thing, and you will learn better.

Before you begin to study, do not forget to clean your desk. A good desk light is important, too. You should turn up the desk light. You will feel tired easily if there isn’t enough light.

小题1:When you have good study habits, you will __________ .

A.learn things quickly

B.remember things easily

C.think about one thing

D.both A and B小题2:The living-room is not a good place for study because it is too ____ .

A.quiet

B.noisy

C.good

D.clean小题3:You’ll feel tired easily if the light is _________ .

A.good

B.enough

C.bad

D.wonderful小题4:Before you begin to study, don’t forget to  ________.

A.clean the desk

B.tidy the room

C.wash your face

D.take a deep breath小题5:In what place can we only think one thing?

A.In the bedroom.

B.In the sitting-room.

C.In the living –room.

D.Near the desk.

题型:单项选择题

脑脊液的形成部位主要是

A.第三脑室

B.脑组织

C.脊髓蛛网膜

D.中脑导水管

E.脑室脉络膜丛

题型:单项选择题

( )是指银行向个人发放的用于消费的、可在一定期限和额度内循环使用的人民币贷款。

A.个人汽车贷款

B.个人耐用消费品贷款

C.个人消费额度贷款

D.个人旅游消费贷款

题型:单项选择题

读图,回答下列问题。(19分)

(1)概括出该区域的自然地理特征。(9分)

(2)该区域种的瓜果特别香甜,自然原因是什么(4分)

(3)该区域荒漠化面积进一步扩大的人为原因是什么?(6分)

更多题库