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【简答题】
已知a为实数， f(x)=a- 2 2 x +1 (x∈R) ． （1）求证：对于任意实数a，y=f（x）在（-∞，+∞）上是增函数； （2）当f（x）是奇函数时，若方程f -1 （x）=log 2 （x+t）总有实数根，求实数t的取值范围．
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举一反三
【单选题】字符数组进行初始化,( )形式是错误。
A.
char c1[ ]={'1', '2', '3'};
B.
char c2[ ]=123;
C.
char c3[ ]={ '1', '2', '3', '\0'};
D.
char c4[ ]="123";
【单选题】Some experts have said that ________ children believe they can succeed, they will never become totally confident of themselves.
A.
if
B.
since
C.
once
D.
unless
【单选题】STC15系列单片机的定时器 T0 和 T1 的中断请求标志位分别是 TF0 和 TF1 。定时器 2 、定时器 3 和定时器 4 的中断请求标志位用户不可见,当相应中断服务程序执行后,中断请求标志位立即自动() 。
A.
取反
B.
高阻态
C.
清 0
D.
置1
【简答题】Now that the experts have agreed to give us some help, ____________ (我们有信心克服困难).
【单选题】----- Have you informed Tom and Ann that some foreign experts will visit our company at 8:00 tomorrow morning? ------ Yes, I have. But_____ of them asked me to tell you that they would not be able to ...
A.
any
B.
either
C.
both
D.
two
【单选题】听力原文： American scientists have found that some birds are more intelligent than experts had originally believed. The scientists say birds have abilities that involve communication and different kinds o...
A.
Talking.
B.
Communication and memory.
C.
Singing.
D.
Finding the way.
【单选题】Experts have long been interested in the education reforms in some top universities.
A.
Y
B.
N
C.
NG
【单选题】According to some experts in fitness those who have no disease are healthy.
A.
Y
B.
N
C.
NG
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