皮皮学，免费搜题
登录
搜题
【多选题】
在保证混凝土强度不变及水泥用量不增加的条件下,改善和易性最有效的方法是( )。A.
掺加减水剂
B.
调整砂率
C.
直接加水
D.
增加石子用量
E.
加人早强剂
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What did the man mean?
A.
He had lost his pen.
B.
He could lend her an extra pen.
C.
He could offer her a pencil.
【简答题】What is his requirement about the settlement of the pen?He expect the pen to be ______.
【简答题】If a British person wants to borrow a pen, what will he say? He will say, '______'.