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A. Because they are paid in cash.
B. Because they are high-grade goods.
C. Because they are samples.
D. Because they are goods on sale.

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中度酸中毒的标准是CO2—CP为：()

A. <5 mmo1／L
B. 5～9 mmol／L
C. 9～13 mmol／L
D. 15～17 mmol／L
E. 17～20 mmol／L

You want to get healthy. You know you need to exercise more. But you are not ready to do intense physical activities. Don’t worry! The best thing for most of us may be to just go for n walk. Yes, walk. At a reasonably vigorous clip (five to six kilometers per hour) for half an hour or so, maybe five or six times a week. You may not feel the benefits all at once, but the evidence suggests that over the long term, a regular walking routine can do you good. Walking, in fact, may be the perfect exercise. For starters, it’s one of the safest things you can do with your body. It’s much easier on the knees than running and doesn’t trigger side effects. Regular physical activity is probably as close to a magic bullet as we will come in modem medicine, If everyone were to walk briskly for 30 minutes every day, we could cut the incidence of many chronic diseases by 30 to 40 per cent. Walking is also a great way to lose body fat, so even if you don’t 10se any weight, your body will have a healthier composition. Most people find they have to walk at least an hour a day to shed kilo. According to the passage, what is the best way to get healthy

A. Going to the gym regularly.
B. Intense physical activities.
C. Running over a long term.
D. A regular walking routine.

肌壁间肌瘤的临床特点为

A. 肌壁间肌瘤常伴血性阴道排液
B. 大的肌壁间肌瘤易致月经周期缩短，经量增多，经期延长
C. 小的肌壁间肌瘤最主要症状为月经过多，随肌瘤增大，可出现经期延长
D. 腹痛为常见症状
E. 是最少见的肌瘤

患者，女，31岁，子宫肌瘤病史。现停经18周，下腹痛4天就诊。无阴道流血流液，体温38℃，WBC 9.3×109/L。该患者最可能的诊断是

A. 子宫肌瘤囊性变
B. 子宫肌瘤红色变
C. 子宫肌瘤蒂扭转
D. 子宫肌瘤感染
E. 子宫肌瘤肉瘤变