对中断概念的理解不正确的是（）。
A.建议变换地方再谈
B.强迫对方停止谈话
C.时间有限，下次再谈
D.暂时休止，然后再谈
参考答案：B
当屋顶有热屏障时，感烟探测器下表而至平顶棚或平屋顶的距离最大是( )。
A．150mm B．200mm C．250mm D．350mm
As is known to us all, failure usually ___ laziness while diligence can ____ success.
[ ]
A. results from; lie in
B. results in; result from
C. leads to; lie in
D. results from; result in
