【单选题】关于补体的生物学活性,下列哪一项是错误的
【单选题】关于补体的生物学活性,下列哪一项是错误的()
【单选题】This is the reason _______ he was absent.
【单选题】关于补体的生物学活性,下列哪一项是错误的
【单选题】This is the reason __ he is leaving now.
【单选题】This is the reason ___ I agree to it.
【简答题】This is the reason. We need to make joint efforts to combat the disease for this reason.
【单选题】This is the reason ______ he didn't come to the meeting.
【简答题】This is the reason ________ he was absent. This is the reason _______ can explain his absence.
【单选题】This is the reason ______he didn't come to the meeting.