A:Fe2O3+3H2SO4═Fe2(SO4)3+3H2O
B:Na2CO3+2HCl═2NaCl+C02↑+H2O
C:C02+Ca(OH)2═CaC03↓+H20
D:2NaOH+CuSO4═Cu(OH)2↓+Na2SO4
He has got everything ready he may want to go hiking.
____
荒凉____(A.荒芜;B.繁华) 喧闹____(A.热闹;B.安静)
冷酷____(A.热情;B.热烈) 温暖____(A.火热;B.寒冷)
荀子曾提出“从道不从君”的观点,这表明荀子