单项选择题

卵巢的生理功能正确的是
A、卵泡期一般是固定不变的
B、随着雌激素分泌量的增多,宫颈粘液量由多渐少
C、排卵期宫颈粘液涂片干燥后可见椭圆形结晶
D、排卵后受孕激素的作用,机体体温呈低温相
E、排卵后阴道上皮细胞加速脱落

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单项选择题
四环素类和氯霉素均会产生的不良反应为( ) A. 肝损害 B. 影响牙骨生长 C. 抑制骨髓造血机能 D. 灰婴综合症 E. 二重感染
单项选择题
Everyone is sensitive to extreme weather condi?tions. But with age, the body may become less ableto respond to long exposure to very hot or verycold temperatures. Some older people mightdevelop hypothermia when exposed to coldweather. Hypothermia is a drop in internal bodytemperature, which can be fatal if not detectedand treated.150. The paragraph best supports the statementthat
A.cold weather is more dangerous for olderpeople than warm weather
B.. hypothermia is a condition that only affectsolder people.
C.. older people who live in warm climates are healthier than older people who live incold climates
D.. an older person is more susceptible tohypothermia than a younger person.
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