明龙骨吊顶，饰面材料与龙骨的搭接宽度应大于龙骨受力面宽（）。
A、1/3
B、1/2
C、2/3
D、3/4
参考答案：C
链激酶过量可用（）对抗。
But for their help, we _____ the program in time. [ ]
A. cannot finish
B. will not finish
C. had not finished
D. could not have finished
