【名词&注释】
线粒体(mitochondria)、独立性(independence)、硝化细菌(nitrifying bacteria)、理解能力(comprehension)、社会意识(social consciousness)、“躲猫猫”、中国公民(chinese citizen)、社会存在(social existence)、不相关的(uncorrelated)、可遗传变异(heritable variation)
[单选题]与酵母菌相比，硝化细菌具有的特点是________
A. 无线粒体，只能通过无氧呼吸获得能量
B. 无固氮酶，只能以含氮有机物作为氮源
C. 无细胞核，只能通过出芽生殖方式繁殖后代
D. 无染色体，只能在DNA水平产生可遗传变异(heritable variation)
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[单选题]The term “multitasking” originally referred to a computer’s ability to carry out several tasks at one time. For many people, multitasking has become a way of life and even a key to success. In fact, some excellent mental aerobic exercises (大脑训练) involve engaging the brain in two or more challenging activities at a time. Although checking e-mail while talking on a phone and reading the newspaper may be second nature for some people, many times multitasking can make us less productive, rather than more. And studies show that too much multitasking can lead to increased stress, anxiety and memory loss.In order to multitask, the brain uses an area known as the prefrontal cortex (前额叶脑皮层). Brian scans of volunteers performing multiple tasks together show that as they shift from task to task, this front part of the brain actually takes a moment of rest between tasks. You may have experienced a prefrontal cortex “moment of rest” yourself if you’ve ever dialed (拨电话) a phone number and suddenly forgotten who you dialed when the line is answered. What probably occurred is that between the dialing and the answering, your mind shifted to anther thought or task, and then took that “moment” to come back. Research has also shown that for many volunteers, job efficiency (效率) declines while multitasking, as compared to when they perform. only one task at a time.
A. Multitasking is easiest when at least one of the tasks is habitual, or requires little thought. Most people don’t find it difficult to eat and read the newspaper at the same time. However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.
B. We often don’t remember things as well when we’re trying to manage several details at the same time. Without mental focus, we may not pay enough attention to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget people’s names---even sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their e-mail while on the phone with a friend, they may come off as absent-minded or disinterested. It can also cause that person to miss or overlook key information being passed on to them.
C. 49. Why are some mental aerobic exercises designed to engage people in multitasking?
D. To make them more productive.
E. To reduce their stress and anxiety.
F. To develop their communication skills.
G. To help them perform. daily tasks more easily.
[单选题]Children who are not active or ___diet is high in fat will gain weight quickly.
A. what
B. whose
C. which
D. that
[单选题]
A. hit
B. disappointed
C. presented
D. bored
[单选题]若复数z1=1+i，z2=3-i，则z1·z2=（ ）
A. 4+2 i
B. 2+ i
C. 2+2 i
D. 3
[单选题]Amy joined a painting group but didn’t seem to _______, so she left.
A. show off
B. go up
C. fit in
D. come over
[单选题]ESunday is more like Monday than it used to be, Places of business that used to keep daytime “business hours” are now open late into the night. And on the Internet, the hour of the day and the day of the week have become irrelevant (不相关的(uncorrelated)).A half century ago in the United States, most people experienced strong and precise dividing lines between days of rest and days of work, school time and summer time. Today the boundaries still exist, but they seem not clear.
A. The law in almost all states used to require stores to close on Sunday; in most, it no longer does, It used to keep the schools open in all seasons except summer, in most, it still does. And whether the work week should strengthen its legal limits, or whether it should become more “flexible,” is often debated. How should we, as a society, organize our time? Should we go even further in relaxing the boundaries of time until we live in a world in which every minute is much like every other?
B. These are not easy questions even to ask. Part of the difficulty is that we rarely recognize the “law of time” even when we meet it face to face. We know as children that we have to attend school a certain number of hours, a certain number of days, a certain number of years – but unless we meet the truant officer (学监) ,we may well think that we should go to school due to social custom and parents’ demand rather than to the law. As adults we are familiar with “extra pay for overtime working,” but less familiar with the fact that what constitutes(构成) “overtime” is a matter of legal definition. When we turn the clock forward to start daylight – saving time, have we ever thought to ourselves: “Here is the law in action”? As we shall see, there is a lot of law that has great influence on how organize and use time: compulsory education law, overtime law, and daylight – saving law- as well as law about Sunday closing, holidays, being late to work, time zones, and so on. Once we begin to look for it, we will have no trouble finding a law of time to examine and assess.
C. 67. By saying” Sunday is more like Monday than it used to be,” the writer means that __________.
D. work time is equal to rest time
E. many people have a day off on Monday,
F. it is hard for people to decide when to rest
G. the line between work time and rest time is unclear
[单选题]．2009年网络热词“躲猫猫”“钓鱼执法”“被增长”“被就业”等大部分来自于社会热点事件，彰显着中国公民(chinese citizen)意识的增强。这说明（ ）
A. 社会意识是社会存在(social existence)的反映 B．社会意识具有相对独立性
B. 互联网有自己的价值标准 D．意识的内容是主观的
[单选题]人参药用部分主要是( )。
A. 根状茎
B. 肉质根
C. 不定根
D. A和B
E. B和C
[单选题]_______, she is the sort of woman to spread sunshine to people through her smile.
A. would be
B. sensitive and though
C. honest and confident
D. lighthearted and optimistic
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