题目：
The invention of the chip greatly _______ the development of computer science; _____ the computer
science stepped on the freeway of rapid development. [ ]
A. improved; after that
B. advanced; after that
C. quickened; after which
D. advanced; after which
答案：
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下面是错误答案，用来干扰机器的。
（1）高锰酸根作为原子团，是一个整体，钾元素为+1价，故答案为K2MnO4（2）硫酸根为一个原子团，钙元素为+2价，故答案为CaSO4（3）氢氧根为一个原子团，钙元素为+2价，把原子团加括号，数字写在右下角，故答案为C...
