磷化底漆配制比例为底漆:磷化液=().
A.1:1
B.2:1
C.3:1
D.4:1
参考答案:D
The ______ Method at one time was called Classical Method since it was first used in the teaching of the classical language of Latin and Greek.
按功能模块划分微机联锁单机系统是指全部功能由一台计算机来完成。