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Smokers’ cardiovascular systems adapt to ______.

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Questions 66-71 are based on the following passage. Laziness is a sin, everyone knows that. We have probably all had lectures pointing out that laziness is immoral, that it is wasteful, and that lazy people will never amount to anything in life. But laziness can be more harmful than that, and it is often caused by more complex reasons than simple wish to avoid work. Some people who appear to be lazy are suffering from much more serious problems. They may be so distrustful of their fellow workers that they are unable to join in any group task for fear of ridicule or fear of having their ideas stolen. These people who seem lazy may be paralyzed by a fear of failure that prevents fruitful work. Or other sorts of fantasies may prevent work; some people are so busy planning, sometimes planning great deals or fantastic achievements, which they are unable to deal with whatever "lesser" work is on hand. Still other people are not avoiding work; strictly speaking, they are merely procrastinating--rescheduling their day. Nevertheless, laziness can actually be helpful. Like procrastinators, some people may look lazy when they are really thinking, planning, contemplating, researching. We should all remember that some great scientific discoveries occurred by chance or while someone was "goofing off’. Newton wasn’t working in the orchard when the apple hit him and he devised the theory of gravity. All of us would like to have someone "lazy" build the car or stove we buy, particular if that job right. And sometimes being "lazy" --that is, taking time off for a rest--is good for the overworked student or executive. Taking a rest can be particular helpful to the athlete who is trying too hard or the doctor who’s simply working himself overtime too many evenings at the clinic. So be careful when you’re tempted to call somebody lazy. That person may be thinking, or planning his next book. ______ The writer concludes that the word laziness is sometimes applied incorrectly.

在现代社会很难划出个体成年的绝对界限。 ( )

A. 对
B. 错

临终病人是指那些患“绝症”，如恶性肿瘤晚期、脑死亡、存活时间为12个月以内的病人。 ( )

A. 对
B. 错

案例：某地下结构物工程采用明挖基坑施工，方案为围护开挖。承包单位对项目安全控制高度重视，坚持“安全第一、预防为主”的方针，建立了安全生产责任制，确定了项目安全目标。拟定出的明挖基坑施工安全措施技术要求是：(1)根据土的分类、物理力学性质确定维护方法。(2)根据工程条件和目标要求，确定开挖工艺、辅助方法、施工环保措施以及节能降耗措施。(3)在基坑顶边弃土时，弃土堆坡脚至挖方上边缘的距离不得小于1.2m，堆上高度不得超过1.5m。(4)做好降水与排水方案，地层土体加固，确保基坑开挖期间的稳定。(5)机械开挖和人工开挖不支撑墓坑时，每次挖方修坡深度不得超过1m。承包单位要编写安全技术交底，简述其基本要求和主要内容。