在Visual FoxPro中，根据变量的作用域来分，内存变量可分为（ ）。A．

某化学兴趣小组利用下列装置进行氧气的实验室制法和有关性质的研究。

（1）写出下列编号仪器的名称：①_________②________。“磨砂”是增加玻璃仪器密封性的一种处理工艺，上图所列仪器中用到“磨砂”工艺处理的是_______________。

（2）甲同学要用氯酸钾和二氧化锰来制取氧气，应选用上图中的_______装置（填编号），该反应的化学方程式是__________________。当氧气收集满并取出集气瓶后，停止该实验的正确操作步骤是________________________________________________。

（3）乙同学选用了C装置制取氧气，那么②中加入的药品是__________。

（4）在选择制取氧气的反应时，你认为需要考虑的因素有哪些___________。（至少答出一点）

可能引起船舶油舱柜爆炸起火的原因是（）。

A．清洗油柜舱产生静电

B．烟囱起火

C．扫气箱着火

D．油柜加热过高

As we all know, nature has supplied every animal except man with some covering for his body such as fur, feathers, hair, and shells as a thick hide. But man has nothing but a thin skin.

If someone were to ask you, "Why did human beings start to cover their bodies with clothes?" most would answer, "To keep themselves warm, of course."

It is only when we begin to think about it a little that we realize that clothes are worn for a great many reasons that have nothing to do with our need for warmth at all.

For example, we wear clothes to some degree in order to decorate ourselves－to make ourselves, if possible, look more dignified (尊严) or nicer.

Clothes of a special kind are often worn to show that the wearer has authority or power. The individual wearing them is treated with respect because he occupies a certain office. The judge on the Bench, for example, might look a very ordinary and unimpressive figure without his wig and gown. Clothes are an important part of ceremony, whether it is connected with belief, the law, parliament, and royalty, the fighting forces or the state. How very different the Queen's Coronation ceremony (加冕仪式) would have looked without the robes, coronets and the cloth of gold.

Sometimes, even in some modern countries people wear some article of clothing, or some jewel, because they believe that it will bring them luck or protect them from evil or illness, or because it is connected with their beliefs.

None of these reasons for wearing clothes－to decorate ourselves, to show our position in the world, for ceremonial purposes, for "luck", to give ourselves dignity and authority－have anything to do with our need for warmth.

65.From the passage we know that wearing clothes is man's basic necessity to________.

A. protect skin    B. show beauty      C. keep warm    D. bring luck

66.According to the passage, the judge wearing special clothes on the Bench________.

A. looks nicer      B. looks different        C. shows wealth         D. shows power

67.Even in modern countries, sometimes people wear certain clothes because________.

A. they believe that they will get protected from bad luck and illness

B. it has something to do with their wealth

C. they want to show their power

D. they enjoy wearing such kind of clothes

68.The author's purpose in writing this article is to tell us that clothes are worn________.

A. for ceremonial occasions B. for many other reasons besides warmth

C. to keep people impressive and nicer        D. to show people's authority or power       

由A、B两已知点测P点，现有的工具是两把钢尺，可以考虑用什么方法进行测设。（）

A.角度交会法

B.直角坐标法

C.距离交会法

D.极坐标法

简述科学实施家庭教育的基本要求。