以下哪些情况需要行肠外营养()
A.急性出血坏死性胰腺炎
B.急性重症胆管炎
C.甲状腺瘤手术后
D.短肠综合征
E.十二指肠球部溃疡穿孔
参考答案:A, B, D, E
2012年2月29日,国务院常务会议同意发布新修订的《环境空气质量标准》,新标准增加了细颗粒物(PM2.5)和臭氧(O3)8小时浓度限值监测指标。下列关于PM2.5的说法,错误的是()。
A.PM2.5是指大气中直径不大于2.5微米的颗粒物
B.新修订的《环境空气质量标准》将PM2.5纳入了强制性监测指标
C.全球PM2.5最高的地区在南非和中国的华北、华东、华中全部
D.与PM10相比,PM2.5对人体健康的危害更大
The use of computer graphics (1) many diverse fields. Applications (2) from the production of charts and graphs, to the generation of realistic images for television and motion pictures to the (3) design of mechanical parts.To encompass all these uses, we can adopt a simple definition:Computer graphics is concerned with all (4) of using a computer to generate images.We can classify applications of computer graphics into four main areas:Display of information, Design, (5) ,User interfaces.
A.simulate
B.Simulation
C.simulator
D.simulacrum