多选题 The two astronomers who simultaneously discovered Comet Hale-Bopp were ______: individuals pursuing astronomy as an interest, not as a profession.

A、 researchers
B、 amateurs
C、 skeptics
D、 dilettantes
E、 pioneers
F、 experimenters

【正确答案】 B、D

【答案解析】[解析] ●冒号说明前后同义重复。
●空格与interest(兴趣)同义重复。
●researcher研究者，amateur业余爱好者，skeptic怀疑者，dilettante业余爱好者，pioneer先锋，experimenter实验者。答案选BD。