小客户的订货虽少，但也是大批买卖的前驱。_爱下问搜题

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问题判断题

小客户的订货虽少，但也是大批买卖的前驱。

答案

参考答案：对

完形填空

One afternoon in January in 1998, Susan Sharp, 43, and her 8-year-old son David, were walking across an icy square,       Susan's cane(手杖) slipped on the ice. Her face        first into the mud. David        her mother's side, “Are you all right, Mom”      , Susan pulled herself up, “I'm okay, Honey,” she said.
Susan was falling more      since she had trouble walking. Every inch of ice was a       danger for her. “I wish I could do something,” the boy thought. David, too, was having        of his own. The boy had a speech problem, so at school he talked       .
　　One day, David's teacher announced a        homework. "Each of you is going to come up with an       ," she said. This was for "INVENT AMERICA", a national competition to encourage creativity in children.
　　An idea        David one evening. If only his mother's cane didn't slip on the ice. “What if I        your cane to a nail coming out of the bottom” he asked his mother.
　　“        the sharp end would scratch(划破) floors,” Susan said.
　　“No, Mom, I       make it like a ball-point pen. You take your hand off the button and the        returns back up.” Hours later the cane was finished. David and his father        as Susan used it to walk 50 feet about the       . Happily Susan cried out, “It        !”
In July 1999, David was      national winner for the "INVENT AMERICA". David began to make public appearance. Thus he was forced to communicate      .Today, David is nearly free of his speech problem, and his cane is becoming well accepted.

A．more slowly

B．more carefully

C．more clearly

单项选择题

与有线网络相比较，卫星通信的一个主要缺点是( )。

A．不能远距离传输
B．延迟时间长
C．误码率比较高
D．支持的服务小