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【单选题】
下列性质中不是晶体的基本性质的是( )A.
对称性
B.
有限性
C.
均一性
D.
各向异性
E.
最小内能性
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【单选题】Passage 3 The United States is on the verge of losing its leading place in the world's technology. So says more than one study in recent years. One of the reasons for this decline is the parallel decl...
A.
a. the number of PH.D. degree holders is declining
B.
b. the number of scientists and engineers is decreasing
C.
c. the number of 22-year-ilds is declining
D.
d. scientists and engineers are not employed
【单选题】It can be inferred from the passage that______.
A.
the problem of prejudice and discrimination in the U.S. will be solved soon
B.
blacks are free people now, so they can enjoy equal rights as whites
C.
prejudice and discrimination are more severe in the South than in the North
D.
now there are more blacks living in the North than in the South
【简答题】The United States is on the verge of losing its leading place in the world’s technology. So says more than one study in recent years. One of the reasons for this decline is the parallel decline in the...
【简答题】A．Its share of computer market has increased faster than Dell. B．H-P now holds the fifty percent of the market. C．It remains the first place of computer printers. D．It is now the largest comput...
【单选题】Which of the following trading partners of the U.S. became its topmost “trade problem” at the beginning of the 21st century?
A.
United Kingdom
B.
Japan
C.
Germany
D.
Canada
E.
China
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