下面哪一项不能有效锻炼肩部肌群的动作是（） A.站姿侧平举 B.站姿前平举 C.躬身

汽车走合期的使用特点有哪些？

血红素合成障碍所致的贫血是（）

A.缺铁性贫血

B.再生障碍性贫血

C.海洋性贫血

D.巨幼细胞贫血

E.慢性病性贫血

女，30岁，北京郊区农民。因1周来发热，尿少2日，半天来无尿于1月20日来诊。一直高热，T39℃以上，伴头痛、全身痛，发病2日在当地医院诊治，T39.5℃，BP70/50mmHg，抗休克、抗感染治疗，疗效不显著。尿少2天，每日400ml，半天来无尿而来本院。居住地有老鼠、。体检：T36.8℃，BP140/90mmHg，P120次／分，神志清楚，精神差，面部红、水肿，有出血点。血WBC16×10⁹/L，PLT70×10⁹/L，尿蛋白（+++），ALT400IU/L，AST520IU／L。

诊断应首先考虑（）

A.败血症

B.流行性脑脊髓膜炎

C.肾综合征出血热

D.伤寒

E.斑疹伤寒

阅读理解。

     CHICAGO (Reuters) - Smoking not only can wrinkle (起皱纹) the face and tarn it yellow-it can

do the same to the whole body, researchers reported on Monday.

The study, published in the Archives of Dermatology, shows that smoking affects the skin all over the

body-even skin protected from the sun.

     "We examined non - facial skin that was protected from the sun, and found that the total number

of packs of cigarettes smoked per day and the total years a person has smoked were linked with the

amount of skin damage a person experienced," Dr.Yolanda Helfrich of the University of Michigan, who

led the study, said in a statement.

    "In participants older than 65 years, smokers had significantly more fine wrinkling than nonsmokers.

Similar findings were seen in participants aged 45 to 65 years," Helfrich "s team added in their report.

     The researchers tested 82 people, smokers and nonsmokers, taking pictures of the inner right arms.

They ranged, in age from 22 to 91 and half were smokers.Independent judges decided how wrinkled

each person' s skin was.

     When skin is exposed to sunlight, notably the face, it becomes coarse, wrinkled and discolored with

a pale yellow tint, Helfrich ' s team wrote.

     Several previous studies have found that cigarette smoking contributes to premature(过早的)skin

aging as measured by facial wrinkles, the study said, but little has been done to measure the aging of

skin not exposed to light.

     The report did not discuss die mechanism involved but previous research has found that cigarette

smoke, among other things, causes blood vessels (血管) beneath the skin to constrict (紧缩), reducing

blood supply to the skin.

     Smoking can also damage the connective tissue that supports both die skin and the internal organs,.

1.When your skin is exposed to sunlight long, it-becomes all of the following but _____.

A. flexible

B. coarse

C. rough

D. discolored

2.How wrinkled a person's skin is doesn't relate to _____.

A. the number of cigarettes a person smokes.

B. the kind and characteristics of skin

C. how long a person smokes

D. how long skin is under sunlight

3. From the passage smoking results in skin aging mainly because _____.

A. it will lower blood supply to skin

B. it can make you feel tired

C. it can make skin come off

D. it can make blood run faster

4.The main purpose of the passage is to _____.

A. inform people about the result of the study

B. advise people how to protect skin

C. warn people not to smoke again

D. introduce a new way of avoid skin aging

杜威的教育无目的说是指教育没有目的。