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【单选题】
与现有电网相比,智能电网体现出 的显著特点。A.
对用户的服务形式简单、信息单向
B.
电源的接入与退出、电能量的传输等更为灵活
C.
电力流、信息流和业务流高度融合
D.
以上都不是
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【单选题】The reason why these men committed suicide is that ______.
A.
they felt they dishonored the family name
B.
they couldn't find gainful employment because of their age after losing their job
C.
they were afraid of being old
D.
Both A and B.
【单选题】Olive oil prepared in a small Italian oil press factory and sold by large supermarkets in the United States is an example of a ________.
A.
net national product
B.
U.S. export
C.
U.S. import
D.
gross domestic product
【单选题】He felt it strange ______ she would be late for class.
A.
that
B.
which
C.
when
D.
why
【单选题】Why did the professor study the Brazilian students' behavior?
A.
He felt puzzled at the students' being late.
B.
He felt angry at the students' rudeness.
C.
He wanted to make the students come on time later.
D.
He wanted to collect data for one of his studies.
【单选题】Passage 3All kinds of pollution as well as the depletion of natural resources (such as fuels, forests, and soil) by carelessly wasteful use, have worried scientists and other thoughtful people. Such p...
A.
Scientists are worried about the depletion of natural resources.
B.
Farmers use chemical fertilizers to destroy insects and weeds.
C.
There haven't been attempts to alert the public to control pollution.
D.
The yearly celebration of Earth Day raised people’s awareness of pollution problem.
【单选题】A man-made chemical that attracts male gypsy moths by duplicating the natural attractant of female gypsy moths has been patented as No. 3,018,219. Dr. Martin Jacobson of Silver Spring, Md., assigned p...
A.
only the male moth
B.
only the female moth
C.
a substitute female attractant
D.
caterpillars
【单选题】Jerry did not regret giving the comment but felt ______ he could have expressed it differently.
A.
why
B.
how
C.
that
D.
whether
【单选题】It is helpful to illustrate these points by looking at the case of the United States, precisely because 3.__________. Coal, copper, iron, silver, and nickel are just a few of the natural resources the...
A.
countries need to - or choose to import at least some goods and services
B.
different countries have comparative advantages on different products
C.
exports are also more than just an outlet for “ excess ” production
D.
it has the capability of producing the goods or supplying the services
E.
it comes closer to being self-sufficient than most other countries
F.
sell goods or services to other countries at prices higher than the prices
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