砌体工程中不准设置脚手架眼（）。
A、120毫米厚砖墙
B、宽度小于1.0米的窗间墙
C、设计上不允许设置
参考答案：A, B, C
The koala sleeps ______, but gets up ______. [ ]
A. during the day; at the evening
B. at day; during night
C. in the day; during the evening
D. during the day; at night
具有C6-C3结构片段的是（）
A.强心甾烯
B.蟾蜍甾二烯
C.生物碱
D.香豆素
E.三萜
