高温情况下使用的钢丝绳，要应用（）加以保护。A、防热罩 B、涂油 C、定期检查

Can you imagine a classroom without one thing that has long been considered a necessary part? No notebooks, no textbooks, no test papers. Nor are there any pencils or pens, which always seem to run out of ink at the critical moment.

A “Paperless classroom” is what more and more schools are trying to realize. Students don’t do any handwriting in this class. Instead, they use hand-sized or specially-designed computers. The teacher downloads texts from Internet libraries and sends them to every student’s personal computer.

Having computers also means that students can use the Web. They can look up information on any subject they’re studying, from maths to social science.

A high school teacher, Judy Herrel in Florida, US, described how her class used the Web. “Using a book that’s three or four years old is impossible,” she said.

A paperless classroom is a big step towards reducing the waste of paper.

“Think about the money and trees we could save with the computers,” she said.

But, with all this technology, there’s always a risk that the machines will break down. So, in case of a power failure or a technical problem, paper textbooks should still be widely available (可得到的) for these students.

小题1:The underlined word “critical” in the first paragraph probably has the same meaning as _______.

A．worrying

B．dangerous

C．happy

D．important小题2:You are sure to find __________ in a paperless classroom.

A．pens

B．computers

C．test papers

D．notebooks小题3:According to Judy Herrel, __________.

A．the Web can talk the students everywhere

B．the Web can take the place of teachers

C．the Web is a better tool for information

D．the Web is for downloading information小题4:The paper textbooks should still be widely available because __________.

A．students won’t have trouble with their pens

B．computers may break down sometimes

C．students may not get all information from the Internet

D．paper textbooks may give students more information

2009年1-6月份全国税收总收入（税收总收入包括税务部门征收的各项税收、海关征收的进出口关税和船舶吨税、海关代征的进口环节增值税和进口环节消费税、财政部门征收的契税和耕地占用税，以及办理的出口退税等各项退税）完成29530．07亿元，同比下降6%，减收1895．68亿元。其中，6月份全国税收收入完成5483．56亿元，同比增长12．2％，增收595．14亿元。回答下列各题。

小题1:消费税是对特定的消费品和消费行为征收的一种税。征收该消费税的作用是

A．抑制人们的消费行为

B．促进第三产业的发展

C．促进社会分工的发展

D．合理调节消费行为，抑制超前消费小题2:理论家将税收称作是国家经济的体现，文学家将税收称作是国家肌体上流通的血液，这说明：                                                          （   ）

A．税收是我国财政收入的重要来源

B．经济的发展是促进税收增长的原动力

C．税收对于国家机器的运转和国民经济的发展起着重要作用

D．我国税收取之于民，用之于民小题3:企业所得税的纳税人是实行独立核算并注册登记的                       ①国有企业   ②集体企业          ③私营企业           ④股份制企业   

⑤个体工商户                ⑥事业单位           ⑦社会团体

A．①②③④

B．①②③④⑤

C．①②③④⑥⑦

D．①②③④⑤⑥⑦

左思的三都赋指什么？

吊顶开裂怎么办？

埋地钢质管道聚脲外防腐层分为（）个等级。