题干
.Finally they decided to go shopping ________ the rain.
A：in spite of
B：because of
C：instead of
D：in case of
答案(点此获取答案解析）
A
A：in spite of
B：because of
C：instead of
D：in case of
=R+2M中，已知R和M的摩尔质量之比为22∶9，当1.6 g X和Y完全反应后，生成4.4 g R。则在此反应中Y和M的质量之比为（ ）
