题干
—— You finally made it , didn’t you ?
——Yes , your help , I would have not succeeded.
A：but for
B：except for
C：but that
D：thanks to
答案(点此获取答案解析）
A
A：but for
B：except for
C：but that
D：thanks to
=" 2Q" + R中，当1.6gX与Y完全反应后，生成4.4g R，则参与反应的Y和生成物Q的质量比为：