单项选择题X 纠错
A. they are transplanted with new brain cells.
B. they learn to do something new.
C. they gain weight in the body.
D. they get new cells from other mic
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A. creating a system that could be set as an example for all smart grids.
B. making use of wind energy to replace electrical power.
C. supplying electricity to homes and businesses without interruption.
D. the efficiency when transmitting electricity for long distances.
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A. The storage of data and content for use by customers.
B. The transmission of data and content for use by customers.
C. The receiving of data and content from various websites.
D. The programming complicated softwar
单项选择题
A. It lost millions of customers.
B. Its Gmail system collapsed.
C. Its market application program failed.
D. Its servers were destroyed by hackers.
单项选择题
a. It is astonishing the local actions of a small number of programmers can bring an entire Internet service to its knees, but that appears to have been the case.
Who was responsible for the collapse of TwitterA. All its users.B. A malicious programmer in Russia.C. A small number of programmers.D. A user in neighboring Georgia,
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A. An animal’s skin is not really useful to us.
B. Our purposes can be better served.
C. Natural materials are limited.
D. It is difficult to copy natur
单项选择题
A. It will contihue to warm the globe for many years.
B. It cannot be easily captured and stored.
C. Its emission will increase in the coming years.
D. It cannot be reflected back into the spac
单项选择题
A. there are 1.25 billion smokers worldwide.
B. 88% of people with psychotic disorders are smokers.
C. about 625 million smokers have mental problems.
D. 2.5 billion people have mental problems worldwid