复合硅酸盐水泥的代号是:(),普通硅酸盐水泥的代号是:()。
参考答案:P•C;P.O
下列哪项不属于公民的诉愿权内容( )。
A.批评权
B.建议权
C.申诉权
D.起诉权
The engine has more than 300 (), made of a number of different materials.
A. compositions
B. compounds
C. constitutions
D. components