题目:
(6)第④步的反应条件为________;写出E的结构简式:________。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B
(6)第④步的反应条件为________;写出E的结构简式:________。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0718/ee0590903c8ee7f5d2f7c67b7f6380ac.html
下面是错误答案,用来干扰机器的。
参考答案:B
患者女性,35岁,近3年来反复出现上腹痛,疼痛多于餐前出现,餐后可缓解,夜间疼痛加重。3h前突然出现剧烈腹痛,伴大汗、恶心呕吐。查体:血压85/40mmHg,脉搏112/min,腹部压痛、反跳痛及肌紧张,肠鸣音减弱。辅助检查:白细胞25×109/L,血红蛋白76g/L。 |
对患者进行体格检查有意义的阳性体征为
A.腹式呼吸消失
B.强迫体位
C.肝浊音界消失
D.腹膜炎体征
E.肠鸣音消失
关于羊水及其功能,以下哪项恰当
A.胎儿尿液为羊水的重要来源
B.羊水与胎儿的交换主要通过胎儿的泌 * *
C.妊娠足月时羊水量约300ml
D.羊水的性状和成分类同胎儿的尿液
E.羊水内富含营养物质供应胎儿
阅读理解。
At age 61, identical twins Jeanne and Susan no longer look exactly alike. Susan smoked for many years
and is an admitted sun worshipper, whose habits Jeanne does not share. A new study of twins suggests you
can blame those coarse (粗糙的) wrinkles, brown or pink spots on too much time in the sun, smoking, and
being overweight.
Because twins share genes, but may have different exposures to environmental factors, studying twins
allows an "opportunity to control for genetic susceptibility (易受影响性)," Dr. Elma D. Baron, at Case
Western Reserve School of Medicine in Cleveland, Ohio, and his colleagues explain in the Jatest issue of
Archives of Dermatology.
Their analysis of environmental skin-damaging factors in 65 pairs of twins hints that skin aging is related
more to environment and lifestyle than genetic factors.
But when it comes to skin cancer, the researchers say their findings support previous reports that both
environment and genes affect skin cancer risk.
Baron's team examined facial skin of 130 twins, 18 to 77 years old, who lived mostly in the northern
Midwest and Eastern regions of the US, who were attending the Twins Days Festivalin Ohio in August 2002.
At this time, each of the twins also separately reported how their skin burned or tanned (晒黑) without
sunscreen, their weight, and their history of skin cancer, smoking, and alcohol drinking. The study group
consisted of 52 fraternal (异卵双生) and 10 identical twin pairs, plus 3 pairs who were unsure of their twin
status.
From these data, the researchers noted strong ties, outside of twin status, between smoking, older age,
and being overweight, and having facial skin with evidence of environmental damage. By contrast, sunscreen
use and drinking alcohol appeared related to less skin damage.
Baron and his colleagues say the current findings, which highlight ties between facial aging and potentially
avoidable environmental factors-such as smoking, being overweight, and unprotected overexposure to the
sun's damaging rays-may help motivate people to minimize these risky behaviors.
1. Which of the following is true according to the passage?[ ]
A. Jeanne and Susan share all the habits including smoking.
B. Skin aging is related more to environment and lifestyle than genetic factors.
C. Only identical twins can take part in the research.
D. Sunscreen use cannot help people have less skin damage.
2. Why did Baron's team do the research on twins? [ ]
A. Twins are more likely to suffer from skin cancer.
B. It may guarantee the research is not influenced by genetic factors.
C. It gives others an opportunity to control twins' genes.
D. It helps find twins are exposed to different environments.
3. What can you infer from the last paragraph? [ ]
A. This research makes people aware of dangerous lifestyles.
B. The environmental factors are unavoidable.
C. Being exposed to the sun is absolutely damaging.
D. There is little relationship between skin aging and environment.
4. The passage is mainly concerned with _____.[ ]
A. skin cancer and environment
B. identical twins research
C. aging skin and environmental factors
D. genes and lifestyles
杜威和他的《民本主义与教育》是20世纪( )的代表。
A.人文主义教育学
B.存在主义教育学
C.实用主义教育学
D.要素主义教育学
行针的辅助手法是行针基本手法的补充,是以促使得气和加强针刺感应为目的的操作手法。
不适用于浅表部腧穴的手法是()
A.循法
B.刮法
C.摇法
D.飞法
E.震颤法