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【单选题】
在R上定义的函数f(x)是偶函数，且f(x)=f(2-x)，若f(x)在区间［1，2］上是减函数，则函数f(x) [ ]A.
在区间[-2，-1]上是增函数，在区间[3，4]上是增函数
B.
在区间[-2，-1]上是增函数，在区间[3，4]上是减函数
C.
在区间[-2，-1]上是减函数，在区间[3，4]上是增函数
D.
在区间[-2，-1]上是减函数，在区间[3，4]上是减函数
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【简答题】A．Because the professor has told her to do so. B．Because it's difficult to understand without notes. C．Because there will be a test the next week. D．Because she has borrowed the man's psychology notes...
【单选题】His writing is so confusing that it's difficult to make out it is that he is trying to express. [ ]
A.
that
B.
how
C.
who
D.
what
【判断题】It's not necessary to set up a complicated password because it's difficult to remember.
A.
正确
B.
错误
【单选题】Which of the following statements is NOT true of robots?
A.
It's difficult to prevent robots from contacting people.
B.
The behavior. of robots will be more unforeseeable.
C.
Robots in the future will Be more intelligent than those today.
D.
Programming robots through a cramped room is the most difficult task.
【单选题】严寒地区受动荷载作用的焊接结构，应选用碳素结构钢的品种是（ ） A．Q235－AF B．Q235－B C
A.
严寒地区受动荷载作用的焊接结构，应选用碳素结构钢的品种是( ) A.Q235-AF
B.
Q235-B
C.
Q235-A·b
D.
Q235-D
【单选题】Which of the following statements is NOT true of robots?
A.
It's difficult to prevent robots from contacting people.
B.
The behavior. of robots will be more unforeseeable.
C.
Robots in the future will be more intelligent than those today.
D.
Programming robots through a cramped room is the most difficult task
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