更多"To scientists, the information cont"的相关试题:
[填空题]Scientists from many countries agree that the recent warming is caused in part by such human activities as man’s ever-increasing consumption of gas or oil.
[简答题]According to scientists, many people believe that physical cleanliness is strongly linked to ______.
[简答题]The following information is contained in a formal invitation you have received. Follow the directions and write an appropriate reply to it.
A wedding invitation from Mr. and Mrs. Fisher. Margaret Anne is their daughter. She is marrying Peter Johnson, Thursday, July 1st, at 10 a. m. at the St. Paul Church with a reception following the ceremony at Christina Hotel. You will not attend because you will be seeing your mother in Shanghai at that time.
You should write approximately 100 words. Do not sign your own name at the end of your letter. Use "Wang Lin" instead. You do not need to write your address.
[单项选择]Scientists say that many factors （ ） changes in the weather.
A. bring in
B. bring off
C. bring about
D. bring forward
[简答题]（翻译题）When imaginative scientists first suggested the possibility that one person could speak directly to another over a long distance, few people took them seriously.
[填空题]Why do we laugh For years scientists have asked themselves this question. No other animals lau
gh and smile--only human beings, so does laughter help us to (36) in any way The answer seems to be that smiling and laughter help us to relax, reducing (37) and preventing illnesses which are caused by stress. Laughter really is the best (38) !
But if you’re unhappy, it can’t do you any good to smile, can it Not true. Apparently the (39) effects of smiling are just the same (40) you feel like smiling or not. Scientists in California asked a group of (41) to act five different feelings: happiness, sadness, (42) , surprise and fear--just using their faces.
Changes in their heart rate, blood pressure and temperature were (43) down. Most of the feelings they acted didn’t cause changes, but when they smiled their heart rate and their blood pressure went down. (44) . A sense of hu
[单项选择]
Invisibility Ring
Scientists can’t yet make an invisibility cloak like the one that Harry Potter uses. But, for the first time, they’ve constructed a simple cloaking device that makes itself and something placed inside it invisible to microwaves.
When a person "sees" an object, his or her eye senses many different waves of visible light as they bounce off the object. The eye and brain then work together to organize the sesensations and reconstruct the object’s original shape. So, to make an object invisible, scientists have to keep waves from bouncing off it. And they have to make sure the object casts no shadow. Otherwise, the absence of reflected light on one side would give the object away.
Invisibility isn’t possible yet with waves of light that the human eye can see. But it is now possible with microwaves. Like visible light, microwaves are a form of radiant energy. They are part of the electromagnetic spectrum, which also
A. A disk or plate placed under a drinking glass to protect a table top.
B. A vessel engaged in coastal trade.
C. A roller coaster.
D. A resident of a coastal are
