134-75+25=134-(75+25)______.
134-75+25=134-(75-25),
所以134-75+25=134-(75+25)是错误的;
故答案为:×.
下列图象正确的是:
①A表示KMnO4加热制O2生成的MnO2的质量与时间的关系图
②B表示CO还原CuO的实验中,试管内固体质量与时间关系图
③C表示向Ca(NO3)2(含少量HCl)溶液中滴加K2CO3溶液,沉淀量与K2CO3的加入量的关系图
④D表示向足量的稀HCl中加入少量Fe,溶液质量与时间的关系图[ ]
A.
B.
C.
D.
The engineers are going through with their highway project, () the expenses have risen.
A. even though
B. just because
C. now that
D. as though