多选题 True vertigo is not mere dizziness but ______ motion: an involuntary, erroneous perception that one is moving.

A、 a precursor to
B、 an illusion of
C、 an effect of
D、 a suspicion of
E、 a consequence of
F、 a delusion of

【正确答案】 B、F

【答案解析】[解析] ●冒号说明前后同义重复。
●空格与involuntary，erroneous(不自觉的错误的)同义重复。
●a precursor to……的先驱，an illusion of……的错觉，an effect of……的结果，a suspicion of对……的怀疑，a consequence of……的结果，a delusion of……的错觉。答案选BF。