The H7N9 bird flu is a disease ______ can be very dangerous.A./ B.who C.what D.which (请说明理由)
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![The H7N9 bird flu is a disease ______ can be very dangerous.A./ B.who C.what D.which (请说明理由)](/uploads/image/z/11448467-35-7.jpg?t=The+H7N9+bird+flu+is+a+disease+______+can+be+very+dangerous.A.%2F+B.who+C.what+D.which+%EF%BC%88%E8%AF%B7%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%EF%BC%89)
The H7N9 bird flu is a disease ______ can be very dangerous.A./ B.who C.what D.which (请说明理由)
The H7N9 bird flu is a disease ______ can be very dangerous.A./ B.who C.what D.which (请说明理由)
The H7N9 bird flu is a disease ______ can be very dangerous.A./ B.who C.what D.which (请说明理由)
选D which作为连接词把两句话接起来的.这里which指代bird flu.