如图所示，理想变压器的原副线圈匝数比n1：n2=1：10，副线圈与阻值R=20Ω
题型：多选题
问题：
如图所示，理想变压器的原副线圈匝数比n1：n2=1：10，副线圈与阻值R=20Ω的电阻相连．原线圈两端所加的电压u=20 sin20πt(V)，则（ ）A．副线圈输出交流电的频率为10Hz B．交流电压表的示数为20 C．电阻R上消耗的电功率为2kW D．原线圈中电流的最大值为100A  |
V题型：多选题
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A scientist turns out to be able to see the future by offering each of some four-year
-olds a piece of
candy and watching how he or she deals with it. Some children reach eagerly for the treat they see.
Some last a few minutes before they give in. But others are determined to wait until the last moment.
By the time the children reach high school, something remarkable has happened. A survey found that
those who as four-year-olds had enough self-control to hold out generally grew up to be more popular,
adventurous, confident and dependable. The chi
ldren who gave in to temptation(诱惑) early on were
more likely to be lonely, easily frustrated(沮丧)and inflexible(固守己见的).
Actually, the ability to delay reward is a sign of emot
ional intelligence which doesn't show up on an IQ
test.
The hardware of the brain and the software of th
e mind have long been scientists' concerns. But
brain theory can't explain what we wonder about most, like the question why some people remain
upbeat in the face of troubles that would sink a less resistant soul.
Here comes the theory of Daniel Goleman, writer of Emotional Intelligence: when it comes to predicting
people's success, brain ability as measured by IQ may actually matter less than the qualities of mind once
thought of as "character".
EQ is not the opposite of IQ. What researchers have been trying to understand is how they work
together; how one's ability to handle stress, for instance, affects the ability to concentrate and put
intelligence to use. Among the ingredients(要素) for success
, researchers now generally agree that IQ
counts for about 20%; the rest depends on everything from social class to luck.
While many researchers in this relatively new field are glad to see emotional issues finally taken seriously,
some few fear EQ invites misuse.
1. The experiment with the four-year-olds makes it clear that _____.
A. the age of 4 is a proper time for scientific experiment
B. emotional intelligence won't show up until adolescence
C. the ability of self-control plays a role in personal success
D. candy can be used to measure a person's emotional intelligence
2. Which of the follo
wing is true of EQ and IQ according to the text?
A. The higher a person's EQ is, the higher his or her IQ is.
B. The higher a person's IQ is, the higher his or her EQ is.
C. Some people can be blessed with lots of both, but some with little of either.
D. Scientists have already discovered the way in which EQ and IQ work together.
3. The underlined word "upbeat" in Paragraph 4 probably means _____.
A. kind
B. floating
C. excited
D. optimistic
4.Why does the author mention the experiment at the beginning of the text?
A. To amuse both the children and readers.
B. To prove the scientist's wisdom.
C. To introduce the topic of the text.
D. To show us how to do an IQ test.
5.What is most likely to be written in the paragraph that follows?
A. Information about famous people with high EQ.
B. Examples showing the opposite voice about EQ.
C. Some reasons why EQ is a relatively new field.
D. Strong demand for basic emotional education.