哪个不是我们所说的四大切花（） A.唐菖蒲 B.月季 C.菊花 D.洋常春藤

凡是涉及款项和财物收付、结算及登记的任何一项工作，必须由两人或两人以上分工办理，这样的工作制度为（）。

A.内部稽核制度

B.内部牵制制度

C.内部审计制度

D.内部约束制度

For computer users, there is no bigger excitement than tossing out your old PC and upgrading to a newer, faster and cleaner machine. With hardware designers like Intel, pushing newer, faster products every year, and new software requiring even more powerful machines, companies and consumers have little choice but to go along.

But this rapid turnover is having a serious effect on the planet. Producing a personal computer consumes large quantities of natural resources. A recent study by the United Nations estimates the energy required to produce a single new computer is equivalent to nearly two barrels of oil. And that doesn't include the 22 kg of chemicals or the 1,500 kg of water used in the manufacturing process.

In fact, pound for pound（均等地）, the process for making a car is about 500% more efficient than that for making a computer. That doesn't matter so much 20 years ago when personal computers were few and far between, but times have changed. These days, computers are found nearly everywhere and sales continue to grow. The number of PCs in use topped one billion in 2002.

Waste in production is only half the problem. Old computers, especially the monitors, are full of dangerous substances, which need to be carefully recycled. The problem is sure to expand over the coming years as users replace their boxy CRT monitors with LCD flat displays.

Europe now requires that 70% of parts from old computers be recycled, but the study’s authors say that’s also part of the problem. The solution, they insist, is for governments and companies to encourage people to use their computers longer, and upgrade rather than replace. But considering that much of the world’s recent economic growth has come from spending on computers and information technology, that advice may sound like wishful thinking. 

小题1:What do computer users have to do every few years according to the passage?

A. Push newer, faster products.

B. Produce more powerful machines.

C. Consume large quantities of natural resources.

D. Upgrade to a newer, faster computer.

小题2:What does the underlined word “that” in paragraph 3 refer to?

A．The pound.

B．The process.

C．The car.

D．The computer.小题3:We can infer from the last paragraph that ____.

A．governments and companies will surely encourage people to use their computers longer

B．governments and companies will probably encourage people to replace their personal computers

C．the world's economic has been growing without people's spending on computers and information technology

D．all parts from old computers are now recycled in Europe小题4:The purpose of writing this passage is ____

A．to encourage companies to push newer, faster personal computers

B．to encourage people to design more new software

C．to encourage people to save their personal computers

D．to encourage people to spend more money on computers and information technology

管线充氮的操作步骤有哪些？

请在“答题”菜单中选择相应的命令，并按照题目要求完成下面的操作。

注意：以下的文件必须保存在考生文件夹下。

刘芯是飞云网上商城的销售助理，负责对网上商品的销售情况进行统计分析，并将结果提交给销售经理。年底，她对符类型商品的销售报表进行统计分析。

打开“飞云网上商城个年销量统计表.xlsx”，按照如下要求完成统计和分析工作：

以分类汇总结果为基础，创建一个簇状圆柱图，图表中仅对每个季度的家电类销售额进行比较。并将该图表放置在一个名为“柱状分析图”新工作表中。

弱酸树脂与强酸树脂联合应用时有哪些交换特性？