心肌自律细胞中兴奋频率最高的是A．窦房结 B．房室交界 C．房室束 D．左、右束支

患者男，30岁，已婚。待人冷淡，没有愉快感，妻儿病了不管，家里来了客人也不热情，不愿意和别人交往，没有亲密的朋友，喜欢独来独往，还常有奇特的幻想。5岁时父母离异。患者对婚姻没有需求，在母亲百般催促下结婚。

此患者的个性特征可能开始于（）

A.两年前

B.18岁后

C.童年或青少年

D.成年期

E.三个月前

Marks ＆ Spencer has a very good reputation for job security and looking after its staff, with things like good perks, (1) , that sort of thing. Do those things actually (2)
I think it is, it is very important. When people have been working (3) , and they may have been in from seven or eight o’clock in the morning, they can come off the sales floor and can go to (4) and obviously they can have tea, coffee, or (5) , and can then buy at very reduced rates (6) , if they want one, or a roll and cheese, in a pleasant environment, (7) , food of the highest quality, there’re areas where they can (8) , or play pool or something, yeah, that is very important because they need (9) . At busy times, they need to get away from it, they need to be able to relax. In terms of all the (10) we’ve got, that is very important, when people know that they will be having medicals, and (11) is another thing, obviously there’s (12) that they will buy which they will be able to buy (13) . For Christmas bonus, we give all our general staff (14) which is guaranteed, and the (15) of that, actually, at the busiest time of the year when they’re (16) and working hard, is fantastic and to see their faces as you (17) with 10% of their salary in it. I believe the environment that you work in, (18) that you work with, the way you are treated, (19) , and the fact that your views are listened to, and you feel you are consulted, that makes people (20) and makes them get up and come to work in the morning.

对ARDS患者机械通气治疗时，以下哪一项措施是错误的。（）

A.许可性高碳酸血症的通气策略

B.使氧饱和度（SaO₂）大于90%

C.使用PEEP

D.使用反比通气模式

E.选择大潮气量（10～15ml/kg）

要求通过while循环不断读入字符，当读入字母N时结束循环。若变量已正确定义，下列正确的程序段是( )

A．while((ch=getchar())!='N')printf("%c",ch);

B．while(ch=getchar()!='N') printf("%c",ch);

C．while(ch=getchar()=='N') printf("%c",ch);

D．while((ch=getchar()) =='N')printf('%c',ch);

当作战飞机需要迅速获得高度优势时，通常采取的措施是跃升。