直肠子宫陷凹完全封闭应为多少分（）
A．16～40分
B．≥40分
C．13～30分
D．6～15分
E．1～3分
参考答案：B
宾馆饭店中厨房的油锅、抽风管道油垢过热起火也能引起火灾。（易）
He is a_____ person, because you are never afraid that he may break his words. [ ]
A. stubborn
B. determined
C. concerned
D. reliable
