According to the experiments, many blind peopleA．sleep at daytime.B．can sleep at any time.

What experience does the man have that may be helpful？A．He knows how to operate the gradin

According to the passage, the experience of helplessness causes rats to______.A．turn off t

According to the results of UKs experiment, which of the following is INCORRECT？A．Voluntee

Why does the woman tell the man about her own experience as a student？A．To make him aware

According to the passage, students would choose the experiments and activities______.A．und

What leads to success in high school according to the passage？A．Experiences in the latter