主排水泵房通往井筒的斜巷倾角一般为（），其中应设人行阶梯。
A.25°
B.35°
C.30°
参考答案：C
根据句意、汉语提示及首字母完成句子。
1. I put some tea l______ on the floor.
2. Everyone was very s______.
3. Lisa showed us some e______.
4. Jenny often ______(梳) her long hair in the morning.
5. We ______(站立) up, when teachers come in.
与黄疸的发生关系不密切的是（）
A.肝
B.胆
C.脾
D.胃
E.肾
.