【单选题】【消耗次数:1】
清除主窗口屏幕的命令是( )
CLEAR SCREEN
CLEAR ALL
CLEAR WINDOWS
CLEAR
参考答案:
复制
纠错
相关题目
【单选题】 His explanation is not at all clear. I find it ____.
①  essential
②  confusing
③  awful
④  puzzled
【单选题】 Flash中Clear(清除)的快捷键是什么
①  Ctrl+V
②  Ctrl+D
③  Delete
④  Ctrl+Shift+V
【单选题】 The ( ) of this approach is a lack of clear leadership.
①  merit
②  advantage
③  virtue
④  downside
【单选题】 We were all surprised when he made it clear that he _____________office soon.
①  leaves
②  would leave
③  left
④  had left
【单选题】 [] has been made clear to all of us, none of you are to come late to class from today on.
①  It
②  As
③  What
④  Which
【单选题】 It was clear that much of what he said was far ____ the truth.
①  for
②  from
③  at
④  to
【单选题】 So clear was his _____ of the case that others had no more to say.
①  attitude
②  presentation
③  comment
④  remark
【单选题】 Why do novice teacher often have problems giving clear instructions?
①  Their language proficiency is low
②  They are fresh from the university
③  Their instructions are too short
④  They are not able to target their instructions to the level of the learners.
【单选题】 Suddenly,?high above the jubilant roar?and?thunder?of?the?( ),?broke the?clear peal?of?a?bugle-note.
①  review
②  revel
③  reveal
④  revert
【单选题】 To make this ____ clear we shall have to look closely into biology’s long history.
①  distinction
②  indication
③  recognition
④  constitution
随机题目
【单选题】 寄生虫感染时,浸润的炎症细胞主要是
①  中性粒细胞
②  嗜酸粒细胞
③  淋巴细胞
④  单核细胞
⑤  浆细胞
【单选题】 具有调理作用的补体成分是
①  C4a
②  C3b
③  C1s
④  C2b
⑤  C2a
【单选题】 B细胞区别于其他APC的特点是
①  吞噬摄取抗原
②  胞饮摄取抗原
③  通过甘露糖受体摄取甘露糖化抗原
④  通过BCR直接摄取抗原
⑤  通过FC受体摄取抗原抗体复合物
【单选题】 补体的三条激活途径共同点是
①  参与的补体成分相同
②  所需要离子相同
③  C3转化酶组成相同
④  激活物质相同
⑤  MAC的形成及溶解细胞效应相同
【单选题】 B细胞上的EB病毒受体是
①  CD5
②  CD19
③  CD22
④  CD21
⑤  CD35
【单选题】 肺炎球菌荚膜多糖免疫家兔出现的情况是
①  诱导细胞免疫和体液免疫
②  产生大量的IgG
③  产生大量的IgM
④  可发生再次应答
⑤  发生迟发型超敏反应炎症
【单选题】 宿主的天然抵抗力是
①  经遗传而获得
②  母体的抗体(IgG)通过胎盘给婴儿而获得
③  接种菌苗或疫苗而获得
④  感染病原微生物而获得
⑤  给宿主转输致敏淋巴细胞而获得
【单选题】 关于细胞因子对Th1和Th2的调节作用,下列哪项是错误的?
①  IL-12促进Th0分化为Th1
②  IL-10抑制Th1的增殖
③  IL-4促进Th1的增殖
④  IL-4促进Th0分化为Th2
⑤  IFN-抑制Th2的增殖
【单选题】 除下列哪一点外,均为特异性免疫的特点?
①  是后天获得
②  可因Ag多次刺激而加强
③  可以遗传
④  有针对性
⑤  免疫活性细胞(T、B细胞)参与
【单选题】 补体系统是
①  正常血清中的单一组分,可被抗原-抗体复合物激活
②  存在于正常血清中,是一组对热稳定的组分
③  正常血清中的单一组分,随抗原刺激而血清含量升高
④  有30多种蛋白组成的多分子系统,具有酶的活性和自我调节作用
⑤  正常血清中的单一组分,其含量很不稳定