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【单选题】
在室温条件下，甲基环丙烷与HBr反应的产物是A.
1-溴丙烷
B.
1-溴丁烷
C.
2-溴丁烷
D.
3-溴丁烷
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【简答题】按要求完成句子练习 街上的行人都匆匆忙忙地赶着回家。(缩句)
【单选题】某电路中有 n = 6 个结点和 b = 9 条支路,用支路电流法列方程求解电路时,需要对结点和回路列出的 KCL 、 KVL 方程的个数分别是 ( ) 。
A.
4个和3个
B.
4个和4个
C.
4个和5个
D.
5个和4个
【简答题】PassageTwo It is the season for some frantic last-minute math--across the country,employees of all stripes are counting backward in an attempt to figure out just how much paid time-off they have left ...
【简答题】PassageTwo In general, our society is becoming one of giant enterprises directed by a bureaucratic(的) management in which man becomes a small, well-oiled cog in the machinery. The oiling is done w...
【单选题】PassageTwo Questions19 to 22 are based on the passage you have just heard. 19.
A.
Exhausting.
B.
Joyful.
C.
Beneficial.
D.
Boring.
【单选题】某电路中有 n = 4 个结点和 b = 7 条支路,用支路电流法列方程求解电路时,需要对结点和回路列出的 KCL 、 KVL 方程的个数分别是 ( ) 。
A.
3个和3个
B.
3个和4个
C.
4个和3个
D.
4个和4个
【简答题】PassageTwo Thegangs behind bars - prison gangs Part1 Prison gangs are flourishing across thecountry. Organized, stealthy and deadly, they are reaching out from their cellsto organize and control crime...
【单选题】某电路中有 n = 5 个结点和 b = 8 条支路,用支路电流法列方程求解电路时,需要对结点和回路列出的 KCL 、 KVL 方程的个数分别是 ( ) 。
A.
4个和3个
B.
4个和4个
C.
4个和5个
D.
5个和4个
【单选题】PassageTwo Questions 19 to 21 are based on the passage you have just heard . Question 19
A.
They had to beg for food after the harvest.
B.
They grew wheat and corn on a small farm.
C.
They shared a small flat with their relatives.
D.
The children walked to school on dirt roads.
【单选题】dgx022101 某电路中有 n = 4个结点和 b = 7条支路,用支路电流法列方程求解电路时,需要对结点和回路列出的KCL、KVL方程的个数分别是( )。
A.
3 个和 3 个
B.
3个和4个
C.
4个和3个
D.
4个和4个
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