问题
单项选择题
目前最常用的智力高低表示法是
A．比率智商
B．离差智商
C．百分位数
D．智力年龄
E．项目数
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
目前最常用的智力高低表示法是
A．比率智商
B．离差智商
C．百分位数
D．智力年龄
E．项目数
参考答案：B
Umbrellas are common in our daily life. On rainy days, many people hold them to prevent the , but it’s not easy to hold an umbrella if there is heavy rain and wind. And it’s harder to make a phone call or ride a bike an umbrella in the hand. An American named Alan Kaufman and his company 6 years inventing a hand-free umbrella. they made it. They called it umbrella. Just touch a button and the umbrella will open . With the help of its “shoulder support”, the umbrella can rest on the user’s . So the user needn’t hold the umbrella any more. He can walk with hands even in the strong wind. The hand-free umbrella is $59.94 each. People all around the world like it very much. Because of this smart , they can use their phones to talk and send short messages in the rain now. in the rain under an umbrella is really cool, isn’t it?
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