[单项选择]A challenging new area in inorganic chemistry is ---- the role of transition metals in the biochemical catalysts called enzymes.
A. that of understanding
B. to have understanding
C. the understanding
D. understanding that

[简答题]Title: Organic chemistry and inorganic chemistry 有机化学和无机化学 大致内容 讲 述有机和无机化学的分类是什么时候出现的，以及分类出现以前化学是怎么分类的。接着讲有些化学家认为有机化学（动物植物）是不能或者没必要研究的；有些化 学家认为有机化学也能研究。但是那些研究有机化学的科学家在有机化学上取得的成就也不如他们在无机化学取得的成就大。这并不表明研究有机化学的科学家没取 得什么进展，他们取得了一些重要进展。后面讲为什么有机化学发展的慢，提到了几点原因。1.自 然界中存在很多纯或者比较纯的无机物质，所以无机化学可以很容易找到纯元素进行研究。文中举例说到很多矿石可以提炼出纯元素，而且纯硫磺在很多地方都可以 找到，连提炼都不用。而有机化学不同，很难找到纯物质进行研究。通过蒸馏得到的物质都是很多元素混杂在一起的，所以很难研究。2.讲 了蒸馏的另外一个缺点：科学家无法确定通过蒸馏获得的物质是不是在植物活动物本身中存在，因为蒸馏可能会破坏物质。然后科学家想办法通过最低的温度进行蒸 馏，可是仍然有很多问题。接着又讲，即使有机化学家研究比较纯的物质比如脂肪或者血液，他们也很难取得进展。因为借助现代科技我们知道这些物质其实是很复 杂的。

[单项选择]EXPRESS PRINT has opened a new office in this area. Please call in to discuss your photocopying requirements. A. Telephone our new office if you want to order anything. B. Visit our new office and talk to us about what you need. C. Contact us with your requirements when you open a new office.

[填空题]Jenny failed in chemistry last semester.

[填空题]new

[单项选择]A. unchallenging B. challenging C. interesting D. exciting

[单项选择]Why did the woman drop her chemistry course

[填空题]At George Washington University, if the chemistry and physics students can score 650 or above on the math SATs and are ______, they can get scholarships of $ 7,500.

[单项选择]The chemistry teacher asked the pupils what water was ______ of.
A. consisted
B. compounded
C. composed
D. conceived

[填空题]New England is an area of (S1) _________ It is said that in New England,(S2) _________ .A large part of New England (S3) _________ farms and farming lands. Yet, New England is not really a fanning area.(S4) _________ .Generally, they are only large enough to support one family .It also happens that the soil of New England is not good.(S5) _________ for so many years that(S6) _________ .(S7) _________ work in factories of small businesses. In these factories they make watches and clocks, shoes, clothing, (S8) _________ ,leather goods, etc. New England workmen (S9) _________ in making many of these things. This skill(S10) _________ in families from father to son.S1

[单项选择]Sport is not only physically challenging, but it can also be mentally challenging. Criticism from coaches, parents, and other teammates, as well as pressure to win can create an excessive amount of anxiety or stress for young athletes (运动员). Stress can be physical, emotional, or psychological and research has indicated that it can lead to burnout.
Burnout has been described as dropping or quitting of an activity that was at one time enjoyable. The early years of development are critical years for learning about oneself. The sport setting is one where valuable experiences can take place. Young athletes can, for example, learn how to cooperate with others, make friends, and gain other social skills that will be used throughout their lives. Coaches and parents should be aware, at all times, that their feedback to youngsters can greatly affect their children. Youngsters may take their parents and coaches criticisms to heart and find a flaw (缺陷) in themselves.
Coaches and pare
A. it can help them learn more about society
B. it enables them to find flaws in themselves
C. it can provide them with valuable experiences
D. it teaches them how to set realistic goals for themselves