题干

下列有关人和高等动物生命活动调节的叙述中,正确的是(   )

A:兴奋在细胞间传递时,突触前膜通过主动运输释放神经递质

B:聋哑人能够理解手语主要依靠视觉中枢

C:内环境渗透压升高时,下丘脑水盐平衡调节中枢兴奋形成渴觉

D:多个来源于同一个B淋巴细胞的浆细胞只能产生同一种抗体

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答案(点此获取答案解析)

D

同类题2

                                                                                                  Christmas Love
    Each December, I promised to make Christmas a relaxed and peaceful experience. I didn't spend too much time on card writing, endless cooking and decorating. Yet still, I found myself tired, unable to enjoy the valuable family moments, and of course, to understand the true meaning of 1.
    Christmas came again. My son, Nicholas, was in primary school that year. It was a very 2 season for a six-year-old. For weeks, he'd been memorizing songs for his school's "Winter Celebration."All the parents were invited to be present at their show.
    I didn't have the heart to tell him I'd be working. Unwilling to 3 his shining moment, I spoke with his teacher. She told me there'd be a dress rehearsal(彩排) the morning of the presentation. All 4 unable to be present that evening were welcome to come then.
    So, on the 5of the dress rehearsal, I arrived ten minutes early. Around the room, I saw several other parents. Because the public school system had long stopped referring to the holiday as "Christmas", I didn't 6 anything other than fun. So, when my son's class rose to sing "Christmas Love", I was a little bit surprised by its title.
    Nicholas was excited, as were all of his classmates. Those in the front row held up large letters, one by one, to7out the title of the song. As the class would sing "C is for Christmas," a child would hold up the letter C. Then, "H is for Happy," and on and on 8 all the children presented the complete message "Christmas Love".
    The show was going smoothly, until suddenly, a small, quiet, girl in the front row held the letter "M"upside down — totally not knowing her letter "M"appeared as a "W". The audience(观众) laughed at this little girl's 9. But she had no idea why they were laughing at her, so she stood tall, 10 holding her "W". The laughter continued until the last letter was raised, and we all saw it together. A sudden11 came over the audience and eyes began to widen. At that moment, we understood why we were there and why we12the holiday.For when the last letter was held high, the message read loud and clear: "CHRIST WAS LOVE".

同类题3

阅读下面文言古诗,完成下面题目。
       陈思王植字子建。年十岁余,诵读诗、论及辞赋数十万言,善属文。太祖尝视其文,谓植曰:“汝倩人邪?”植跪曰:“言出为论,下笔成章,顾当面试,奈何倩人?”时邺铜爵台新成,太祖悉将诸子登台,使各为赋。植援笔立成,可观,太祖甚异之。性简易,不治威仪,舆马服饰,不尚华丽。每进见难问,应声而对,特见宠爱。太祖征孙权,使植留守邺,戒之曰:“吾昔为顿邱令,年二十三。思此时所行,无悔于今。今汝年亦二十三矣,可不勉与!”植既以才见异,而丁仪、丁廙、杨修等为之羽翼。太祖狐疑,几为太子者数矣。而植任性而行,不自雕励,饮酒不节。文帝御之以术,矫情自饰,宫人左右,并为之说,故遂定为嗣。植尝乘车行驰道①中,开司马门②出。太祖大怒,公车令坐死。由是重诸侯科禁,而植宠日衰。太祖既虑终始之变,以杨修颇有才策,而又袁氏之甥也,于是以罪诛修。植益内不自安。二十四年,曹仁为关羽所围。太祖以植为南中郎将,行征虏将军,欲遣救仁,呼有所敕戒。植醉不能受命,于是悔而罢之。
                                                                                                                         (节选自《三国志•陈思王曹植传))
      注:①驰道:也称御道,专供天子行车之路。③司马门:即宫门,每门有司马主管,故名。