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【多选题】
以下各项属于选择反应试剂时需要考虑的因素？A.
反应活性与选择性
B.
成本与来源
C.
安全性和毒性
D.
原子经济学
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【单选题】How many binary digits are represented by 1KB in Microcomputer?
A.
1000
B.
8 ×1000
C.
1024
D.
8 ×1024
【单选题】(single choice)How many binary digits are required to count to decimal 100?
A.
2
B.
7
C.
100
D.
3
【简答题】Even the cheapest and least complicated digitals (电子表,电子钟) are minor miracles of modern technology. They replace the traditional hands, springs and cogs with flickering digits and electric circuits. S...
【简答题】How many digits are there in the binary number system?
【单选题】How many passenger digits are there between Beijing and Tianjin per day?
A.
8,000
B.
80,000
C.
800
D.
800,000
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