关于淋巴系统的说法不正确的是以下哪一项
A．淋巴系统是一个相对独立的循环系统
B．在集合淋巴管和淋巴干的行程中常有数量不等的淋巴结
C．集合淋巴管内有瓣膜，呈念珠状
D．淋巴管在组织结构与生理功能方面与静脉不同
E．淋巴系统与血液系统在左、右颈静脉角相联系
参考答案：D
解析：[解题思路] 淋巴管与静脉在结构和功能上相似，所以可以用取材广泛的浅静脉代替淋巴管做吻合治疗淋巴水肿。
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| Valentine's Day was the time my father chose to show his love for the special people in his life.Over the years I fondly (天真地) thought__1__him as my "Valentine man". My first recollection of the__2__he could bring to Valentine's Day came when I was six.That morning at the breakfast table I found a card and a giftwrapped package at my chair.The card was__3__"Love, Dad" and the gift was a ring with a small piece of red glass to__4__my birthstone,a ruby (红宝石). There is__5__difference between red glass and rubies to a child of six,and I remember__6__that ring with pride that all the cards in the world__7__not surpass (超越). __8__I grew older,the gifts gave__9__to heartshaped boxes filled with my__10__chocolate and always included a__11__card signed "Love,Dad". In those years my thankyou became__12__of a perfunctory (敷衍) response.The cards seemed less__13__,and I took for granted that the Valentine would__14__be there.I had__15__my hopes and dreams in receiving cards and gifts from "significant others" and "Love,Dad" just didn't seem quite__16__. His final card remains on my desk today.It's a__17__of how special fathers can be and how important it has been to me over the years to know that I had a father who continued a__18__of love with simple acts of understanding and an ability to express happiness over the people in his life. Those things never__19__,nor does the memory of a man who never__20__being my valentine. | ||||
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