Lately some scientists are experimenting ___________ white mice to ____________ this kind of medicine.A．on,try onB．with, test onC．on ,test outD．with,carry out-高中英语-n多题

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Lately some scientists are experimenting ___________ white mice to ____________ this kind of medicine.

A．on,try on

B．with, test on

C．on ,test out

D．with,carry out

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◎ 解析

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