在教室内,我们能从不同角度看到投影在银幕上的影像,是由于银幕发生了光的 反射。同

题型:填空题

问题:

在教室内,我们能从不同角度看到投影在银幕上的影像,是由于银幕发生了光的        反射。同时我们能分辨出银幕上不同人物的声音,是因为他们声音的__      不同。

考点:音色的概念漫反射,镜面反射
题型:填空题

化工设备日常维护的主要内容是调节、修理和()。

A.设备档案

B.三同时

C.设备检修

D.巡回检查

题型:填空题

阅读理解。

    For thousands of years, man has enjoyed the taste of apples. Apples, which are about 85 percent water,

grow almost everywhere in the world but the hottest and coldest areas (地区). Among the leading countries

in apple production are China, France and the United States.

    There are various kinds of apples, but a very few make up the majority of those grown for sale. The three

most common kinds grown in the United States are Delicious, golden Delicious, and McIntosh.   

     Apples are different in colour, size, and taste. The colour of the skin may be red, green, or yellow. They

have various sizes, with Delicious apples being among the largest. The taste may be sweet or tart (酸的).

Generally, sweet apples are eaten fresh while tart apples are used to make applesauce (苹果酱).   

     Apple trees may grow as tall as twelve metres. They do best in areas that have very cold winters. Although

no fruit is yielded during the winter, this cold period is good for the tree.

1. It can be learned from the text that Delicious apples are _____.[ ]

A. grown in France 

B. sold everywhere

C. very big      

D. quite sweet

2. Cold winter weather is good for _____.[ ]

A.the growth of apple trees 

B. producing large apples

C. improving the taste of apples 

D. the increase of water in apples

3. China, France and the United States are considered to _____. [ ]

A. be large producers of apples 

B. be large producers of applesauce

C. have the longest history in apple production

D. have the coldest winter among apple producing countries

4. The word yielded in the last sentence means _____.[ ]

A.improved

B. increased 

C.produced

D. sold

题型:填空题

在不影响信息披露的完整性和不引致阅读不便的情况下,发行人可采用相互引证的方法,对各相关部分的内容进行适当的技术处理,以避免重复和保持文字简洁。()

题型:填空题

从用户角度来看,数据库系统可以分为()。

A、单用户结构

B、分布式结构

C、客户/服务器结构

D、星型结构

题型:填空题

以GJB冠名的标准属于(3)。PSD、PAD等程序构造的图形表示属于(4)。

空白处(3)应选择()

A.国际标准

B.国家标准

C.行业标准

D.企业规范

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