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【简答题】
请说出或者上网寻找到我国古代有名的知礼懂仪的故事。
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举一反三
【单选题】How many Earths could fit inside the Sun?
A.
One million.
B.
93 million.
C.
Two million.
D.
100 million.
【单选题】The chances of discovering life on Neptune are about a million__________.
A.
at one
B.
for one
C.
to one
D.
against one
【单选题】It was estimated that the thieves had stolen _____ worth of jewelry from the shop.
A.
one-million-dollar
B.
one million dollar’s
C.
one million dollars’
D.
one million dollars
【单选题】对光电效应和康普顿效应而言,以下正确的说法是
A.
两种效应中电子和光子组成的系统都服从动量守恒和能量守恒定律
B.
两种效应都属于电子与光子的弹性碰撞过程
C.
两种效应都属于电子吸收光子的过程
D.
光电效应是吸收光子的过程，而康普顿效应则是相当于光子和电子的弹性碰撞过程
【单选题】Thirty-one million Americans are over 60 years of age, and twenty-nine million of them are healthy, busy, productive citizens. By the year 2030, one in every five people in the United States will be o...
A.
They feel lonely.
B.
They are suffering from cancer.
C.
They cannot walk or see or hear well.
D.
They have got heart problems.
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