关于Thereareseveralresea的百科

• ThereareseveralresearchcentersinChina

• 问题详情：ThereareseveralresearchcentersinChina________acertaindiseasecalledBirdFluisbeingstudied.A.which      B.where          C.when                 D.what【回答】B.因为先行词是researchcenters并在定语从句中作状语，所以...
• 2022-04-0913149