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【单选题】
E A rainforest is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below l6℃.Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate.Without the forest cover,these areas would reflect more heat into the atmosphere,warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns,potentially causing certain natural disasters all over the world. In the past hundred years,humans have begun destroying rainforests in search of three major resources(资源):land for crops,wood for paper and other products,land for raising farm animals.This action affects the environment as a whole.For example,a lot of carbon dioxide (二氧化碳)in the air comes from burning the rainforests.People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit. There are two main reasons for this.Firstly,when people cut down trees,generally they can only use the land for a year or two.Secondly,cutting large sections of rainforests may provide a good supply of wood right now,but in the long run it actually reduces the world’s wood supply. Rainforests are often called the world’s drug store.More than 25% of the medicines we use today come from plants in rainforests.However,fewer than l%of rainforest plants have been examined for their medical value.It is extremely likely that our best chance to cure diseases lies somewhere in the world’s shrinking rainforests. 72.Rainforests can help to adjust the climate because they .
A.
reflect more heat into the atmosphere
B.
bring about high rainfall throughout the world
C.
rarely cause the temperature to drop lower than l6℃
D.
reduce the effect of heat from the sun on the earth
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【单选题】 下列哪一项不属于卸妆过程中需要用到的物品?
A.
卸妆水
B.
粉底液
C.
卸妆棉
D.
洗面奶
【单选题】Which of the following is NOT one of the ways to build strong brands?
A.
Dare to be different from competitors.
B.
Determining their fame by creating a unique competitive advantage.
C.
Building a parent brand.
D.
Fostering an emotional connection with the customers.
【单选题】下列哪一项不属于卸妆过程中需要用到的物品?
A.
粉底液
B.
卸妆水
C.
卸妆棉
D.
洗面奶
【单选题】标注球面半径尺寸时,一般应在尺寸数字前加注
A.
B.
SR
C.
φ
D.
R
【判断题】马和牛的蹄匣都是由蹄壁、蹄底和蹄球三部分组成。
A.
正确
B.
错误
【简答题】在注射剂生产过程中应该如何避免污染热原?简述出去热原的方法。
【简答题】生活中处处有化学.你知道下列化学原理吗? (1)衣服上沾上油污时,可用洗涤剂或汽油除去,其中洗涤剂除油的原理是______; (2)图书、档案、贵重设备、精密仪器等处的失火,可用二氧化碳灭火器来扑灭,其原理是______; (3)燃煤时,将煤球做成蜂窝煤的原因是______.
【简答题】________, _________ ________ make sure that the brands are strong.
【简答题】周庄双桥,由一座石拱桥和一座石梁桥组成。因为桥面一横一竖,桥洞一方一圆,样子很像是古时候人们使用的钥匙,当地人便称之为( )。
【单选题】洗涤剂去污的原理用公式表示成()。
A.
织物•污垢•洗涤剂→织物+污垢+洗涤剂
B.
织物+污垢•洗涤剂→织物+污垢+洗涤剂
C.
织物+污垢+洗涤剂→织物+污垢•洗涤剂
D.
织物•污垢+洗涤剂→织物+污垢•洗涤剂
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