题干

下列有关血液循环系统的描述,说法正确的是(   )

A:血细胞中数量最多的是白细胞,它对人体具有防御和保护的作用

B:输血时,A型血患者可以接受AB型血

C:病人打点滴时,针头扎入的是静脉血管

D:心脏四个心腔中,左心室的壁最厚,它与肺动脉相连

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答案(点此获取答案解析)

C

同类题1

完形填空

    There was my mother, standing in a fuzzy (毛绒绒的) pink bunny(兔子)costume. This can't be, 1 I thought to myself. Being ten was 2 enough.

    Our class was taking a trip to a convalescent home(疗养院) that day.I had 3 to stay at home pretending I'd caught some rare disease. My mother who's a(n) 4, sent me to school anyway.

    When we got there, I 5 wished for that 6. I'd fall to the ground and be 7the humiliation (耻笑) of anyone ever knowing that I 8every day after school there, dressed as a bunny.

    “Hi, Shelly!” The residents waved at me, “ Do you know them?” someone asked. “No! They 9 me for someone else. I'm Machille,” I responded. I didn't look up 10 I might make eye contact with them. Then, Mrs. Deist, our teacher, handed us tulips (郁金香) to give to the residents. I quickly went to the back of the 11. My mother just went along her way--- hopping(单足跳跃). Last year, we hopped together. 12, “I'm too old for that now”, I thought.

    I hid behind my class. “ Shelly, how about a game of Fish?” Lou asked. My class and teacher 13 and stared. “ Machille, do you know these people?” Mrs.Deist asked me.

“Um….yes!”  

    “Well you should 14 the way,” she said, smiling. So I stepped forward, handed a tulip to Rose, waved to Frank and gave Mr. Blusso a high-five.

    “My mother is in a convalescent home. I wish she could have someone like you to 15 her.” Mrs Deist said. My mother hopped over then. “This is my mom. Every day she looks after these special people who need nurses' care.” I stood straight as I 16 the information. My mother then explained a program where kids can 17 after school. The residents cheered at the18, and my class seemed excited, too.

    I realized how 19 it made me to make other people smile and feel good. I should never be 20 of that.

同类题3

阅读下面的文言文。完成各题

李孝子传

袁枚

       嘉定之曲江里有孝子李维煌,字裕光。父岩士,生孝子十年殁,家无旨畜,母针衽以供孝子出就外塾。泣曰:“养亲,儿取也。儿不养母,乃藉母养儿,儿心何安!”遂弃书史,勤耕作,市珍怪之食,进之母,而已甘食淡焉。母病喉,勺饮,喀喀不下者三昼夜矣。孝子呼天求救,母梦神人刺以针曰:“哀而子之孝也。”觉,一汗而愈。雍正七年秋,海风起,城中生波涛,孝子居故穿漏,夜半屋摇摇然,孝子趋负母,伏几下。俄而前后庐舍崩,所避处独完。

       孝子父亡逾年,大父亦亡。及其莽也,时届严寒,体故赢,手炭土,僵大雪中。治冢匠数人,蕴火覆之,沦以汤,乃苏,年五十五卒。卒时抱母大恸,嘱其孤某善事大母。

       相传其幼时,居父丧,寝苫块中,哀号三年,每出入,邻人指曰:小孝子,小孝子。盖其天性然也。乾隆三十年,大吏闻于朝建坊曲江里立祠其旁。

       论曰:《孝经》一书,圣人所以为人子训者至矣。然世人方读书以求孝,而李孝氏子独因孝以废书,何耶?中庸曰:“率性④之谓道,修道之谓教。”古之人能率其性者,无俟于教也。不然,慈乌反哺,羔羊跪乳,使彼所读何书哉?

(选自《小仓山房文集•卷二十七》,有删节)

     【注】①旨畜:贮藏的美好食品。②喀喀(kā):呕吐声。③大父:祖父。④率性:遵循本性。