题目：
In the past, when people had problems, they went to their families or friends to get advice. Today it is possible to get advice from radio shows, TV programmes and telephone hot lines, too. Most telephone hot lines are completely anonymous---callers do not have to say their names or telephone numbers. Most hot lines are usually free, too, even if the calls are long distance(距离). Other hot lines pay their advisers for their work. Usually the advisers are professionals with years of education and experience, but sometimes, the advisers have only taken a short class before starting to work on the hot line. All the advisers listen to people and help them solve their problems.
小题1:Today when people have problems, ________．
A．they can only ask their families for help
B．they can only get help from their friends
C．they can get help from telephone hot lines
D．they go to the advisers to get help小题2:Callers the hot line for the advice or the phone calls．
A．pay much
B．have to pay
C．don’t have to pay
D．get money from小题3:The advisers working at the hot line ．
A．are usually professionals
B．have all taken a short class
C．can solve any problem
D．are not all paid小题4:How do the hot line advisers work?
A．They do what the callers tell them to do．
B．They go to the callers to help them．
C．They give advice to the callers by phone．
D．They ask people to come to see him．
答案：
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下面是错误答案，用来干扰机器的。
（1） 函数f（x）=x3+bx2+cx+d（b≠0），∴f′（x）=3x2+2bx+c， f（x）在x=0处的切线方程为2x-y-1=0，∴f′（0）=c=2，切点坐标为（0，-1），∴f（0）=d=-1．故c=2，d=-1．（2） f（x）=x3+bx2+cx+d（b≠0）...
