在学校举办的2011年元旦晚会上，舞台灯发出的红光照在穿白色上衣_爱下问搜题

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问题选择题

在学校举办的2011年元旦晚会上，舞台灯发出的红光照在穿白色上衣、蓝色裙子的演员身上，同学们将会看到她（　　）

A．上衣、裙子都呈红色

B．上衣呈红色，裙子呈黑色

C．上衣呈白色，裙子呈蓝色

D．上衣、裙子都呈黑色

答案

白色物体可以反射所有光线，而蓝色物体只可以反射蓝色光线，因此当红色光照射到白色衣服上时，反射红光，而照到蓝色衣服上时，蓝色衣服不能反射红光，因此看到白色上衣呈现红色，而蓝色裙子不反射光，故呈现黑色．

故选 B．

单项选择题

为了保证组培成功，（）不能作为外植体用于组培。

A、表面带菌的鳞片

B、感病的茎段

C、成熟的叶片

D、幼嫩的茎尖

完形填空

Children find meanings in their old family tales.
When Stephen Guyer’s three children were growing up, he told them stories about how his grandfather, a banker,        all in the 1930s, but did not lose sight of what he valued most. In one of the darkest times when his strong-minded grandfather was nearly         , he loaded his family into the car and          them to see family members in Canada with a         , “There are more important things in life than money.”
The          took on a new meaning recently when Mr. Guyer downsized to a          house from a more expensive and comfortable one. He was          that his children, a daughter, 15, and twins, 22, would be upset. To his surprise, they weren’t. Instead, their reaction echoed (重复) their great-grandfather’s. What they          about was how warm the people were in the house and how much of their heart was accessible.
Many parents are finding family stories have surprising power to help children through           times. Storytelling experts say the phenomenon (现象) reflects a growing         in telling tales, evidenced (证明) by a rise in storytelling events and festivals.
A university          of 65 families with children aged from 14 to 16 found kids’ ability to          parents’ stories was linked to a lower rate of anger and anxiety.
The          is telling the stories in a way children can hear. We’re not talking here about the kind of story that         , “When I was a kid, I walked to school every day uphill both ways, barefoot in the snow.” Instead, we should choose a story suited (适合) to the child’s         , and make eye contact to create “a personal experience”. We don’t have to tell children what they should take from the story and what the moral is.

C．arrangement

C．disappointed