皮皮学，免费搜题
登录
搜题
【简答题】
沉淀反应的抗原是
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】An important point the author made in this passage is ______.
A.
living together before marriage is significant every couple should try it
B.
living together before marriage is a choice that should be respected
C.
living together is the best way to bridge the gaps between a couple
D.
living together is a symbol of the modem form. of civilization