A. It could be seen only through special equipment. B. It did not approach the Earth. C. It did not provide valuable scientific information. D. It was moving too rapidly for scientists to photograph. 参考答案:A 答案解析:[解析]文章里说到,预测结果是慧星的到来会是“brilliant spectacle”光耀夺目的壮观,而实际上too pale to be seen with the unaided eye。故应选A