与单层环氧粉末相比，双层环氧粉末防腐层的（）降低。
A、粘结力
B、吸水率
C、耐蚀性
D、耐候性
参考答案：B
If you come second in the race，you’ll get qualification to compete for the next round．
A．/;a
B．the；a
C．8；the
D．/；the
In math exam, the _______ careful you are, the _______ mistakes you'll make. [ ]
A. more, more
B. more, less
C. less, fewer
D. more, fewer
