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【简答题】
阅读理解。 Tom was not old, but he did not have much hair. His wife Grace had thick, beautiful, black hair. They had one daughter. Her name was Jane, and she was four and a half years old. There was a photo of her father in the living room, and a few days ago, Jane looked at it for a long time and then said to her mother, 'Mummy, why did Dad have very little hair?' Grace laughed and said, 'He has very little hair because he thinks a lot, Jane. He's a clever man.' Jane looked at her mother's thick, black hair for a few seconds, and then she asked 'Mum, why did you have a lot of hair?' 1. There were _____ people in Tom's family. A. two B. three C. four D. five 2. Tom had _____ hair. A. very little B. a little C. few D. a few 3. Grace had _____ hair. A. a little B. a lot of C. many D. a few 4. There was a photo of _____ in the living room. A. her B. her parents C. her mother D. her father 5. Jane wanted to know why her mother had _____ hair. A. black B. beautiful C. less D. a lot of
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【简答题】已知命题p:函数f(x)=(2a-1) x 是增函数;命题q:函数y=ln(2ax 2 -2ax+1)的定义域为R,若p∨q为真,p∧q为假,求实数a的取值范围.
【单选题】函数y=ln(x-1)的定义域是(  )
A.
(1,2)
B.
(e,+∞)
C.
(1,+∞)
D.
(1,e)
【单选题】在原子吸收分析中, 过大的灯电流除了产生光谱干扰外, 还使发射共振线的谱线 轮廓变宽. 这种变宽属于
A.
自然变宽
B.
压力变宽
C.
场致变宽
D.
多普勒变宽
【单选题】函数 y= ln(x-1) 2x- x 2 的定义域是(  )
A.
(0,2)
B.
(1,2)
C.
(-∞,0)∪(1,+∞)
D.
(-∞,0)∪(2,+∞)
【单选题】在原子吸收分析中, 过大的灯电流除了产生光谱干扰外, 还使发射共振线的谱线 轮廓变宽. 这种变宽属于
A.
自然变宽
B.
压力变宽
C.
多普勒变宽(热变宽)
D.
场致变宽
【单选题】在原子吸收分析中, 过大的灯电流除了产生光谱干扰外, 还使发射共振线的谱线轮廓变宽. 这种变宽属于
A.
自然变宽
B.
压力变宽
C.
场致变宽
D.
多普勒变宽(热变宽)
【单选题】函数y=ln(x-1)的定义域是(  )
A.
(1,2)
B.
[1,+∝)
C.
(1,+∝)
D.
(1,2)∪(2.,+∝)
【单选题】在原子吸收分析中, 过大的灯电流除了产生光谱干扰外, 还使发射共振线的谱线轮廓变宽. 这种变宽属于
A.
自然变宽
B.
压力变宽
C.
场致变宽
D.
多普勒变宽(热变宽)
【单选题】在原子吸收分析中,过大的灯电流除了产生光谱于扰外,还使发射共振线的谱线轮廓变宽。这种变宽属于
A.
自然变宽
B.
压力变宽
C.
场致变宽
D.
多普勒变宽 ( 热变宽 )
【简答题】设命题p:函数y=x 2 -(a+1)x-1在区间[-1,1]上单调递减;命题q:函数y=ln(x 2 +ax+1)的定义域是R.如果命题p或q为真命题,p且q为假命题,求a的取值范围.
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