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【判断题】
一个具有 b 条支路和 n 个节点的电路,如果用支路法分析,需列 b 个方程,用节点法分析需列 n-1 个方程,用网分析需列 b-(n-1) 个方程。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】Where is the man going?
A.
He's going to a post office.
B.
He's going to school.
C.
He's going home.
【单选题】What's John going to do?
A.
He's going to work.
B.
He's going to buy a new TV set.
C.
He's going to ask someone to fix his TV set.
【单选题】— ? — Great! [ ]
A.
What's it going
B.
How's it going
C.
Where's going
D.
How it is going
【简答题】A．It's going to attract a lot of students. B．It's going to be a lot of fun. C．It's going to require a lot of reading. D．It's going to work out quite well.
【单选题】流行病学科的三大要素是指:
A.
描述分布、提出假设、验证假设
B.
原理、方法、应用
C.
揭示现象、找出原因、提供措施
D.
描述、分析、验证
E.
疾病、伤害、健康
【简答题】Sometimes it is difficult to compare money values in different periods of history because______.
【简答题】病害流行的三要素是指( )、( )、( )。
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