题干
276. Computer technology has _____ a revolution in business practices. Which of the following words is not suitable to be put in the blank?
A：started
B：caused
C：brought about
D：Made
答案(点此获取答案解析）
D
达的主要原因之一是
质分子，其分子大小、电荷的性质和数量情况如右图所示，下列有关蛋白质分离的叙述正确的是