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【简答题】
定义在R上的函数f（x），如果存在函数g（x）=kx+b（k，b为常数），使得f（x）≥g（x）对一切实数x都成立，则称g（x）为f（x）的一个函数．现有如下命题： ①对给定的函数f（x），其函数可能不存在，也可能无数个； ②g（x）=2x为函数f（x）=2 x 的一个函数； ③若函数g（x）=x-a为函数f（x）=ax 2 的函数，则a的取值范围是 a≥ 1 2 ； ④定义域和值域都是R的函数f（x）不存在函数； 其中正确命题的序号是______．
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举一反三
【简答题】已知表达式 g = lambda x, y=3, z=5: x*y*z,则语句 print(g(1)) 的输出结果为_______。
【简答题】完型填空。 Dr Spear is a doctor living in London. She decided one morning to 1 her cat away. Dr Spear thought that it was much 2 for the animal to live in the 3 . 4 she put Mimi in her car and drove more...
【单选题】What did Dr. Sasaki do when she first did her experiment?
A.
She monitored the brain activity of participants sleeping in a new environment.
B.
She recruited 35 participants from her Department of Psychological Sciences.
C.
She studied the differences between the two sides of participants' brains.
D.
She tested her findings about birds and dolphins on human subjects.
【单选题】现代心理学的创始人是（）
A.
洛采（LotzE）
B.
冯特（W Wundt）
C.
惠特曼（L witmer）
D.
霍尔（Hall）
E.
卡特尔（JM Cattell）
【简答题】(复习) 1、总结绘制梁的内力图的方法有哪些? 2、用最简单的方法绘制图示梁的剪力图、弯矩图(写在作业本上,拍照上传)
【单选题】She was so ______ in her job that she didn't hear the phone ring.
A.
attracted
B.
absorbed
C.
drawn
D.
concentrated
【单选题】What was Dr. Brown known for in her previous job that she will probably continue in her new position?
A.
Moving into new markets
B.
Introducing new products for agricultural use
C.
Consulting with experts outside the company
D.
Reducing operating costs
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