要求装配后的构件摆放整齐主要是为了（）。
A、便于运输
B、文明施工
C、防止变形
D、便于管理
参考答案：C
对划线部分提问：
1. Lily is reading an English newspaper now.
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2. Daniel goes to the Swimming Club twice a week.
3. Betty likes her classroom because it's big and clean.
沉香含（）
A.果糖
B.小檗碱
C.鞣质和黄酮类
D.皂苷
E.白木香酸及白木香醛
