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【单选题】
在三相四线制中性点接地供电系统中,指出下列关于中线各结论中哪一个是错误的()。
A.
三相负载做星形连接时,必须有中线
B.
三相对称负载做星形连接时,中线电流必等于零
C.
为保证中线可靠接地,中线应多处接地
D.
三相负载越接近对称时,中线电流就越小
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举一反三
【单选题】The Fisher effect states that the ________
A.
nominal interest rate equals the expected infla¬tion rate plus the real rate of interest.
B.
nominal interest rate equals the real rate of interest minus the expected inflation rate.
C.
real rate of interest equals the nominal interest rate plus the expected inflation rate.
D.
expected inflation rate equals the nominal interest rate plus the real rate of interest.
【判断题】逻辑型的是PL/SQL特有的。
A.
正确
B.
错误
【判断题】营销中介人即指中间商。
A.
正确
B.
错误
【单选题】0304 p=( )时, 是调和函数.
A.
0
B.
1
C.
2
D.
-2
【单选题】甲公司拥有乙公司80%的有表决权股份,并拥有丙公司30%的有表决权股份,乙公司拥有丙公司40%的有表决权股份,则甲公司直接和间接持有丙公司有表决权股份的合计数为(    )。
A.
80%    
B.
30%
C.
40%    
D.
70%
【单选题】维持蛋白质二级结构稳定性的键力是
A.
范德华力
B.
静电相互作用
C.
氢键
D.
疏水相互作用
【单选题】75 She was so fat that she could only just __ through the door.
A.
assemble
B.
appear
C.
squeeze
D.
gather
【简答题】During World War II, you could buy a loaf of bread for 10 to 15 cents, a new car for less than $1,000, and an average house for around $5,000. In the 21 st century, bread, cars, houses, and just about...
【简答题】She is so fat that she has to go on a _______.A. dinner B. meal C. drink D. diet
【单选题】Susan was fat last year. So she decided more exercise. Now she is much more beautiful.
A.
take
B.
to take
C.
taking
D.
took
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