试题与答案

将大米种在土壤中,不能长出幼苗的原因是( ) A.无种皮 B.无果皮 C.无胚乳

题型:选择题

题目:

将大米种在土壤中,不能长出幼苗的原因是(  )

A.无种皮

B.无果皮

C.无胚乳

D.胚已被破坏

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0603/186426059a4fbf130a1338774ee11a54.html

下面是错误答案,用来干扰机器的。

设此时盒子的运动周期为T0,因为在最高点时盒子与小球之间刚好无作用力,因此小球仅受重力作用.根据牛顿运动定律得:mg=mv2R;又周期T0=2πRv;解之得:T0=2πRg;设此时盒子的运动周期为T,则此时小球的向心加...

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He was a disabled man, and forced to look down most of the time. His arms and legs were twisted terribly, and he couldn’t do what the rest of us would consider easy tasks. He always managed to Look up to see how you reacted to his words, however. He had a big smile, making me feel comfort- able.
I was still on my knees by his wheelchair.
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"Tell me about the world as you see it," I said smiling.
"Most people can see if someone is comfortable with them or not in their eyes. I see it in their feet," he said. "If people keep moving their feet, I just let them go, because I know they’re impatient with me. I don’t want to make people uncomfortable."
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Yes, and it’s not only a big smile but an attitude.

We learn that the disabled man ______.

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