皮皮学，免费搜题
登录
搜题
【单选题】
能够改善混凝土拌合物流动性的外加剂包括 ( ) 等。A.
减水剂
B.
早强剂
C.
防水剂
D.
引气剂
E.
泵送剂
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
【简答题】Fill in the blanks with the proper forms of the verbs given below. penetrate, reproduce, arrange, appreciate, visit, import, grant, provide 1) We are writing to ____an appointment between President Ca...
【简答题】仿照例子,改写句子。 try as...might 例:I try very hard to stay cheerful, but all I ever get is hassle. You can rewrite it like this: Try as I might to stay cheerful, all I ever get is hassle. I try hard to get t...
【简答题】A)await B) course C) subjects D) dispatching E) academic F) envelope G) ually H) importantly I) procedure J) deliver K) horrors L)case M) waiting ...
相关题目：