问题
选择题
My mother was very ______, she didn't approve of my hippie (嬉皮) lifestyle.[ ]
A. controversial
B. conventional
C. contradictory
D. contemporary
答案
答案：B
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My mother was very ______, she didn't approve of my hippie (嬉皮) lifestyle.[ ]
A. controversial
B. conventional
C. contradictory
D. contemporary
答案：B
＋
＋2H2O＝Al（OH）3↓＋NH3·H2O，向含有等物质的量的NH4＋、