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【单选题】
部分电路欧姆定律反映了在( )的一段电路中,电流与这段电路两端的电压及电阻的关系。
A.
含电源
B.
不含电源
C.
含电源和负载
D.
不含电源和负载
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参考答案:
举一反三
【单选题】Annie found her father-in-law annoying because he ______.
A.
kept giving her unwanted presents
B.
rarely talked to her and Bob
C.
sat when she was cleaning
D.
never said what time he was getting up
【简答题】若丨x-y+3丨与丨x+y-1995丨互为相反数,则 x+2y x-y 的值是______.
【简答题】已知 a , b 是非零向量,且 a , b 夹角为 π 3 ,则向量 p = a 丨 a 丨 + b 丨 b 丨 的模为______.
【单选题】The girl is going to study abroad next month and       when he was young.
A.
so her father was
B.
so her father did
C.
so was her father
D.
so did her father
【简答题】计算:(- ) -2 -( -1) 0 +丨-2丨+
【简答题】已知集合A={x丨2<x<4 },B={x丨x<3或x>5 }则A∩B= (A) {x丨2<x<5 } (B) {x丨x<4或x>5 } (C) {x丨2<x<3 } (D) {x丨x<2或x>5 }
【简答题】已知向量 m , n 的夹角为 π 6 ,且丨 m 丨= 3 ,丨 n 丨=2,则丨 m - n 丨=______.
【单选题】设 a , b 是非零向量,若函数f(x)=(x a + b )?( a -x b )的图象是一条直线,则必有(  )
A.
a ⊥ b
B.
a ∥ b
C.
丨 a 丨=丨 b 丨
D.
丨 a 丨 ≠丨 b 丨
【单选题】Alice _____ her father that both she and her husband would be happy if he would live with them. [     ]
A.
convinced
B.
reinforced
C.
pledged
D.
required
【简答题】At first, Emma______ her father because she thought he was faithful to her mother.
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