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【判断题】
f(x)=1+x+ 是初等函数。A.
正确
B.
错误
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举一反三
【单选题】_________earlier，I might have done that in a totally different way．A.I have been told###SX
A.
_________earlier，I might have done that in a totally different way． A.I have been told
B.
I were told
C.
Had l been told
D.
Had I told
【单选题】I want to buy that kind of cloth because I _____ the cloth _____ well.
A.
have told; washes
B.
have been told; is washed
C.
was told; washed
D.
have been told; washes
【单选题】在坐标原点放一正电荷 Q ,它在 P 点 ( X=+1 , Y=0 ) 产生的电场强度为 ,现在,另外有一个负电荷 -2Q ,试问应将它放在什么位置才能使P点的电场强度等于零?
A.
X轴上x>1；
B.
X轴上0
C.
X轴上x<0；
D.
Y轴上y>0；
E.
Y轴上y<0。
【单选题】I want to buy that kind of cloth because I _____ the cloth _____ well.
A.
have been told; washes
B.
have told; washes
C.
was told; washed
D.
have been told; is washed
【单选题】在坐标原点放一正电荷Q,它在P点(x=+1,y=0)产生的电场强度为 .现在,另外有一个负电荷-2Q,试问应将它放在什么位置才能使P点的电场强度等于零?
A.
x轴上x>1.
B.
x轴上0
C.
x轴上x<0
D.
y轴上y>0
【单选题】I want to buy that kind of cloth because I ＿＿＿＿＿ the cloth ＿＿＿＿ well.
A.
have told； washes
B.
have been told； washes
C.
was told； washed
D.
have been told； is washed
【单选题】在坐标原点放一正电荷Q，它在P点（X=+1，Y=0）产生的电场强度为 现在，另外有一个负电荷-2Q，试问应将它放在什么位置才能使P点的电场强度等于零？（）
A.
A
B.
B
C.
C
D.
D
E.
E
【单选题】3在坐标原点放一正电荷 Q ,它在 P 点 ( X=+1 , Y=0 ) 产生的电场强度为 ,现在,另外有一个负电荷 -2Q ,试问应将它放在什么位置才能使P点的电场强度等于零?
A.
X轴上x>1；
B.
X轴上0
C.
X轴上x<0；
D.
Y轴上y>0；
E.
Y轴上y<0。
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