搜题请搜索小程序“爱下问搜题”
问题
填空题
在制革工业上,常用的蒙囿剂是:()和()。
答案
参考答案:有机酸;它们的盐类
选择题
The policeman told me that I had passed the driving test and never in my life _____ so happy and excited.
A. I felt
B. did I feel
C. I had felt
D. had I felt
查看答案
单项选择题
坚硬的粘性土和岩石地基上,上下游翼墙可采用()。
A.圆弧形
B.扭曲面与岸坡连接的形式
C.折线形
D.椭圆弧形
查看答案