Which of the following statements about electronic book is NOT true
A. It can contain a library of information or every title on today's best-seller list.
B. Although we know the basic technology, we can't see it for sale now.
C. The laptop needs a lot of power to keep LCD screens work, and those screens have shortcoming.
D. You can change the title and the content in the electronic book as you like.
腋动脉 ( )
A. 于第一肋外缘处接续锁骨下动脉
B. 于背阔肌下缘处接续锁骨下动脉
C. 出胸廓内动脉
D. 发出甲状颈干
在暴雨天时，混合污水容易溢入水体造成水体污染的是( )。
A. 合流制
B. 分流制
C. 截流式合流制
D. 不完全分流制
三层滤料滤池除满足粒径要求外，其材料选择上小粒径宜选择垂直矿石及大粒径为( )。
A. 石英砂
B. 砾石
C. 无烟煤
D. 重质矿石
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