题干

体循环和肺循环的起点分别是(  )

A:左心房、左心室

B:右心房、右心室

C:左心室、右心室

D:左心房、右心房

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答案(点此获取答案解析)

C

同类题2

阅读黄传惕《故宫博物院》选段,完成下面题目。
        ①太和殿俗称金銮殿,高28米,面积2380多平方米,是故宫最大的殿堂。在湛蓝的天空下,那金黄色的琉璃瓦重檐屋顶,显得格外辉煌。殿檐斗拱、额枋、梁柱,装饰着青蓝点金和贴金彩画。正面是一根红色大圆柱,金琐窗,朱漆门,同台基相互衬映,色彩鲜明,雄伟壮丽。
       ②大殿正中是一个约两米高的朱漆方台,上面安放着金漆雕龙宝座,背后是雕龙屏。方台两旁有六根高大的蟠龙金柱,每根大柱上盘绕着矫健的金龙。仰望殿顶,中央藻井有一条巨大的雕金蟠龙。从龙口里垂下一颗银白色大圆珠,周围环绕着六颗小珠,龙头、宝珠正对着下面的宝座。梁枋间彩画绚丽,有双龙戏珠、单龙翔舞,有行龙、升龙、降龙,多态多姿,龙身周围还衬托着流云火焰。
        ③三大殿建筑在紫禁城的中轴线上,这条线也是北京城的中轴线,向南从午门到天安门延伸到正阳门、永定门,往北从神武门到地安门、鼓楼,全长约八公里。
        ④太和殿是举行重大典礼的地方。皇帝即位、生日、婚礼和元旦等都在这里受朝贺。每逢大典,殿外的白石台基上下跪满文武百官,中间御道两边排列着仪仗,皇帝端坐在宝座上。大殿廊下,鸣钟击磬,乐声悠扬。台基上的香炉和铜龟、铜鹤里点起檀香或松柏枝,烟雾缭绕。
        ⑤太和殿后面是中和殿。这是一个亭子形方殿,殿顶把四道垂脊攒在一起,正中安放着一个大圆鎏金宝顶,轮廓非常优美。举行大典,皇帝先在这里休息。
        ⑥中和殿后面是保和殿。雍正后,这里是举行最高一级考试——殿试的地方。

同类题3

阅读理解

    Jia Zuosheng, 27, used to work as a security guard (保安) at the library of Tsinghua University. But a few months ago, he became a college student in Lishan College in Shandong and he studies math there now. When hearing this news, many people were surprised. On school opening day, many reporters waited outside the school gate to interview him.

    “I was born in a poor village in Shandong Province," said Jia. "Our village has never had a college student. Most boys work in town after growing up. I failed the National College Entrance Exam(高考)twice. Then I went to Beijing to find jobs. In the following years, I went on studying by myself while working.”

    At the end of 2009, Jia found a job as a security guard at the library of Tsinghua University.“I cherished (珍惜) the job very much because it gave me a good chance to read books," Jia said.“I usually worked at night so I had plenty of time to study in the daytime.” When he had problems that he couldn't work out, Jia asked the students at Tsinghua for help. "My dream is to be a college teacher. So I need further education. That's the reason why I took the National College Entrance Exam again," Jia said. “I wish to educate students with my knowledge and love and help them enjoy true, kind and beautiful things.”

    Jia's mother said Jia has always been independent(独立的)and knows what he wants. But she has other worries. "It's difficult to find such a good job at present as a library guard in Tsinghua University. I'm not sure if this is a right decision.” “I will never regret(后悔),”said Jia. "Everyone will have a new start. It's the end, and the beginning.”