已知一元二次方程x2+x－1=0，下列判断正确的是( ) A．该方程_爱下问搜题

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问题选择题

已知一元二次方程x²+x－1=0，下列判断正确的是( )

A．该方程有两个相等的实数根
B．该方程有两个不相等的实数根
C．该方程无实数根
D．该方程根的情况不确定

答案

答案：B

完形填空

One summer day my father sent me to buy wire for our farm. At 16，I liked ____ better than driving our truck，____ this time I was not happy. My father had told me I’d have to ask for credit(赊账) at the store.
Sixteen is a ____age，when a young man wants respect，not charity. It was 1976，and the ugly ___ of racial discrimination was ____ a fact of life. I’d seen my friends ask for credit and then stand，head down，while the store owner ___ whether they were “good for it.” I knew black youths just like me who were ___ like thieves by the store clerk each time they went into a grocery.
My family was ___.We paid our debts. But before harvest，cash was short. Would the store owner ____ us?
At Davis’s store，Buck Davis stood behind the cash desk，talking to a farmer. I nodded ____ I passed him on my way to the hardware shelves. When I brought my ____ to the cash desk，I said ____，“I need to put this on credit.”
The farmer gave me an amused，distrustful ___.But Buck’s face didn’t change. “Sure，” he said ___.“Your daddy is ___ good for it.” He ___ to the other man. “This here is one of James Williams’s sons.”
The farmer nodded in a neighborly __.I was filled with pride. James Williams’s son. Those three words had opened a door to an adult’s respect and trust.
That day I discovered that the good name my parents had ____ brought our whole family the respect of our neighbors. Everyone knew what to ___ from a Williams: a decent person who kept his word and respected himself ____ much to do wrong.

B．confidently

单项选择题

电话约访时，首先要确定客户（）。

A.通话是否方便

B.对产品是否有兴趣

C.是否听说过自己

D.是否有时间见面