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【单选题】
What can we infer from the passage?A.
We have enough written record of our ancestors to prove the identity.
B.
Many American slaves got to know who their ancestors were though DNA.
C.
An adopted child generally lacks enough information to prove his identity.
D.
Molecular genealogy can be used to prove a relationship between individuals.
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举一反三
【单选题】部分装载船的谷物移动倾侧体积与舱内谷物的_________有关 (41610:第十章_散装谷物运输:2043)
A.
颗粒大小
B.
积载因数
C.
装舱深度
D.
种类
【单选题】下列二进制与十六进制的等式错误的是( )。
A.
1011 0110B = 0xB6
B.
0110 1101B = 0x6D
C.
1101 1111B = 0xDF
D.
0111 1011B = 0x7A
【简答题】根据所给竖式．将正确的选项填在括号内． A．商大了 B．商正好 C．商小了．
【简答题】阅读下面短文，根据所给语境，仿照示例E. F.将A-D分别填在空白处，使标题与内容相匹配。 __F__ Sometimes, you don't pass the exam, It doesn't matter. A person is never perfect (完美的). Sometime she also does some terrible things. __ E __ Many pe...
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