What produces a waterproof super glue,
acts like a vacuum cleaner, and even teaches scientists about gene repair The
humble little shellfish known as the mussel (贻贝)。 Mussels are
found worldwide. Some live in the sea. Others inhabit freshwater streams and
lakes. When you try to move a mussel from a rock, you will discover what an
incredibly firm grip it has- a necessity if the mussel is to resist the sharp
grab of a hungry seabird or the pounding waves of the sea. How does it manage to
cling so tight When it choose a place to set up home, it pokes its
tongue-shaped foot out of its shell and presses it against a solid surface.
Special glands give off a fluid mixture of proteins into a channel that runs the
length of the foot. The liquid quickly hardens into a fine, elastic thread about
an inch long. Then a tiny pad-like structur A. seal itself from being damaged by sea water B. protect itself from being the food of other animals C. protect itself from being blown away by strong wind D. produce the waterproof super glue
[单项选择] Passage Five
What do we think with Only the brain
Hardly. The brain is tike a telephone exchange. It is the switchboard, but not
the whole system. Its function is to receive incoming signals, make proper
connections, and send the messages through to their destination. For efficient
service, the body must function as a whole. But where is the
"mind’ Is it in the brain Or perhaps in the nervous system After all, can we
say that the mind is in any particular place It is not a thing like a leg or
even the brain. It is a function, an activity. Aristotle, twenty-three hundred
years ago, observed that the mind was to the body what cutting was to the ax.
When the ax is not in use, there is no cutting. So with the mind. "mind" said
Charles H • Woolbert, "is what the body is doing." If
this activity is necessary for thinking, it is also nec A. Bodily Communication. B. Bodily Actions. C. Spoken Language. D. Conversations.
[单项选择]What I say or what I think () no business of yours. A. is B. are C. has D. have
[简答题]part 1
Introduction
What is your name
What is the meaning of your name
Are you working or studying
Who gave you your name
[简答题]For five years I have maintained our nation’s solid commitment to scientific research and technological development, because I believe they’re essential to our nation’s economic growth and to building the right kind of bridge to the 21st century. The balanced budget I will submit in just a few weeks to Congress reflects this continued commitment. And, in my upcoming State of the Union Address, I’ll talk more about what we arc doing to keep America on the cutting edge of the scientific and technological advancements that are driving our new global economy.
Still, it’s good to remember that scientific advancement does not occur in a moral vacuum. Technological developments divorced from values will not bring us one step closer to meeting the challenges or reaping the benefits of the 21st century.
This week, like many Americans, I learned the profoundly troubling news that a member of the scientific community is actually laying plans to clone a human being. Personally, I believe t
[单项选择]
For twenty-five years I was a full time thief, specializing in picking pockets. In southeast London, that’s an honorable profession. Anyone can break in a house and steal things, but picking somebody’s pocket takes skill. My sister and I were among the most successful pickpocket teams in London. We worked in hotels’ theater lobbies, airports, shopping centers and restaurants. Now we don’t steal anymore, but this crime is worldwide. Here’s how to protect yourself. Professional pickpockets do not see victims, only handbags, jewels and money. Mothers with babies, the elderly, and the disabled are all fair game. My preferred target was the lone female, the handbag at her side, the right side to be exact. So if I’m next to her, I can reach it cautiously with my right hand across my body. Only about one woman in a thousand carries her bag on the left, and I tended to steer clear of them. Women whose bags are hanging in front of them are tricky for th A. Clothing stores where people are relaxed and off guard. B. Hotels and restaurants in southeast London. C. Airports where people carry a lot of luggage. D. Theater lobbies with uniformed security guards.
最新试题
-
●
[单选题]后缘襟翼手柄有多少个刻度:( )
-
●
[单选题]计算机应用软件Word的菜单中,经常有一些命令是灰色的,这表示( )
-
●
[单选题]17.胎龄38周,出生体重2200g,身长45cm,皮肤红润,胎毛少,耳廓成形,足底纹路多
-
●
[单选题]183. If the whole operation _____ beforehand,
-
●
[多选题]从事高空作业的人员严禁班前饮酒,作业中严禁(),在作业的高处睡觉。
-
●
[简答题]自动闭塞区段,连续式机车信号机显示一个红色灯光,表示列车接近的地面信号机显示红色灯光。
购买搜题卡查看答案
[会员特权] 开通VIP, 查看 全部题目答案
[会员特权] 享免全部广告特权
请选择支付方式
-
微信支付
-
支付宝支付
立即支付
系统将自动为您注册账号
请使用微信扫码支付
请不要关闭本页面,支付完成后请点击【支付完成】按钮
恭喜您,购买搜题卡成功
重要提示:请拍照或截图保存账号密码!
我要搜题网官网:https://www.woyaosouti.com
我已记住账号密码
| |