皮皮学，免费搜题
登录
搜题
【单选题】
某混凝土实验室配合比为1：2.20：3.80，每立方米混凝土用水泥300kg，水灰比为0.4，现场实测砂、石含水率分别为2%、1%，用500L(升)搅拌机搅拌该混凝土，每搅拌一筒混凝土用水量为( )。A.
60.5kg
B.
60kg
C.
50kg
D.
47.7kg
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】The outcry over aproposed element shows that______.
A.
the public fully supported the Japanese architect for his design of a new exit
B.
people are very sensitive to the project
C.
people had profound respect for Giorgio Vasari
D.
many people wished to keep the original artistic value of Uffizi
【简答题】现有100g溶质质量分数为15%的过氧乙酸溶液，欲配制成溶质质量分数为1.5%的溶液来使用，需加水多少克？
【单选题】Which of the statements best summarizes the main idea of the passage?
A.
The death of Japanese fisherman caused tension between Japan and Russia.
B.
The dispute over the chain islands initiated the incident.
C.
Japanese foreign minister summoned Russian's deputy ambassador to handle the dispute.
D.
The Russian patrol captured the Japanese vessel and took three fishermen into custody.
【简答题】A.She is going to study in another country. B.She received a letter from a Japanese friend. C.She got a job at a travel agency. D.She met a Japanese friend at a travel agency.
【简答题】现欲配制0.5mol/L碳酸钠溶液100mL，然后向配制好的溶液中加入足量的稀盐酸．试计算： （1）配制溶液需要碳酸钠固体的质量是多少？______ （2）加入稀盐酸后生成的二氧化碳在标准状况下的体积是多少？______．
【单选题】Which of the following is FALSE?
A.
Leeson failed when staking the company's money on Japanese derivatives.
B.
Leeson was extradited to Singapore.
C.
Leeson was arrested on his way back to London.
D.
Leeson accepted the six-and-half year sentence.
【简答题】实验室欲配制80mL 2mol?L ? 1 的KCl溶液，就配制该溶液的过程回答下列各小题： （1）不需要的仪器是 。 A.烧杯 B.100mL容量瓶 C.量筒 D.胶头滴管 E.玻璃棒 F. 50mL容量瓶 （2）配制时应称取KCl g。 （3）下列操作的正确顺序是（用字母表示） 。 A．冷却 B.称量 C.洗涤 D.定容 E.溶解 F.摇...
相关题目：