题目内容
在卵巢激素周期性分泌的影响下，子宫内膜周期性增殖、脱落、出血，伴随周期性的阴道流血为月经
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月经周期子宫内膜的变化分为卵泡期、排卵期、黄体期
月经周期受到卵巢激素分泌的影响
在月经周期规律的情况下，月经开始后的3-5日为排卵期
Part I : Paras. 1 – 3The introduction part, includes the first three paragraphs, providing a framework to differentiate among ____, _____ and ________.Part II: Paras.4 – 8Section 1 (Para. 4): Workers and laborers are different in their _______ toward their work.Section 2 (Para. 5): Workers and laborers differ in the amount of ___________ they derive from their jobs.Section 3 (Paras. 6 – 8): In modern times, workers and laborers spend their __________ in different waysPart III Para. 9The conclusion part summarizes that everyone has to find a job andearn a living, and that whatever job you choose, you must contend with this essential question: ______________
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