在标定高锰酸钾溶液时,若温度过高,则H2C2O4分解为()。
A.CO2
B.CO
C.CO2和CO
D.CO2-3
参考答案:C
根据句意,用括号内所给单词的适当形式填空。
1. It is often ______ (cloud) in Sichuan.
2. I like _____ (make) snowmen very much.
3. He loves going _____ (swim) in summer.
4.The _____ (five) program(节目) is from Ellen and Mary.
5. _____ (not climb) the tree. It's dangerous.
()浆体在凝结硬化过程中,其体积发生微小膨胀。
A.石灰
B.建筑石膏
C.菱苦土
D.水泥