单选题从狭义上说，信息技术(Information Technology)是指以微电子技术、通信技术、______为主干，结合集成电路技术、光盘技术、机器人技术、高清晰度电视技术等的综合技术。 A.计算机技术 B.文字 C.纸张 D.印刷术

单选题假定学生已经掌握三角形的高这个概念，判断学生掌握这个概念的行为标准是( )．A．学生能说明三角形高的本质特征B．学生能陈述三角形高的定义C．给出任意三角形(如锐角、直角、钝角三角形)图形或实物，学生能正确画出它们的高(或找出它们的高)D．懂得三角形的高是与底边相垂直的

单选题【2014．四川宜宾】老师在教授课文时，采用列提纲的形式来板书，这里老师使用的学习策略是( )。

单选题人体接触疫苗后会产生相应抗体，产生抗体的细胞是______。

单选题下图为沿90°E各地雪线高度分布图。读图回答下列问题。

单选题下列对公民直接参与民主决策的意义理解正确的是______。 ①有利于把人民利益作为决策的出发点 ②有利于充分发扬民主，反映民意 ③有利于促进公民对决策的理解和贯彻执行 ④有助于促进决策的科学化、合理化

单选题“与时俱进、开拓创新”是______。

单选题下列各句中，加点的成语使用恰当的一项是______。

单选题若C=x∈N|x≤10，则()。

单选题从海洋的不同深度采集到四种类型浮游植物(Ⅰ、Ⅱ、Ⅲ、Ⅳ)，测定每种类型在不同光照强度下的光合作用速率，如下图所示，在最深的海域采集到的应是______。A．ⅠB．ⅡC．ⅢD．Ⅳ

单选题绝大多数的梦都会发生在( )阶段。

单选题流行于浙江地区的戏曲是______

单选题“造(zao)”、“英(ying)”、“约(yue)”、“冤(yuan)”这四个字音的音素个数，依次为______。

单选题关于运动有几种看法：甲说：“太阳每天都是新的”，乙说：“方生方死，方死方生”，丙说：“飞鸟之景未尝动也”。这些观点按顺序分别是______

单选题含有比喻和比拟两种修辞方法，并且使用都恰当的一句是______。

单选题根据《行政处罚法》的规定，对______等行政处罚案件，经当事人申请，应当举行听证。

单选题教师要学生列举筷子的用途，某学生在单位时间内给出了很多的答案，但都在餐饮用具范围内，这表明该学生的发散性思维______。

单选题下列有关线粒体和叶绿体叙述，错误的是______ A.线粒体和叶绿体携带的遗传信息可以表达出来 B.线粒体和叶绿体为双层膜结构，其内膜中酶的种类相同 C.线粒体内膜向内折叠形成嵴，叶绿体类囊体堆叠形成基粒 D.蓝藻没有叶绿体也能进行光合作用

单选题 Every country has its own culture. Even though each country uses doors. Doors may have {{U}} {{U}} 1 {{/U}} {{/U}}functions and purposes which lead to {{U}} {{U}} 2 {{/U}} {{/U}}differences. When I first came to America, I noticed that a public building had two different {{U}} {{U}} 3 {{/U}} {{/U}}and they had distinct functions. You have to push the door with the word "PUSH" to go out of the building and to pull the door with the word "PULL" to {{U}} {{U}} 4 {{/U}} {{/U}}the building. This was new to me, because we use the {{U}} {{U}} 5 {{/U}} {{/U}}door in south Korea. For quite a few times I failed to go out of a shopping centre and was embarrassed. The way of using school bus doors was also {{U}} {{U}} 6 {{/U}} {{/U}}to me. I used to take the school bus to classes. The school decided that when the driver opened both the front and back doors, {{U}} {{U}} 7 {{/U}} {{/U}}who were getting off the bus should get off first, and students who were getting on should get on {{U}} {{U}} 8 {{/U}} {{/U}}In south Korea, we do not need to wait for people to get off. One morning, I hurried to the bus, and when the bus doors opened, I {{U}} {{U}} 9 {{/U}} {{/U}}tried to get on the school bus through the front door. All the students around looked at me, I was totally {{U}} {{U}} 10 {{/U}} {{/U}}, and my face went red.

单选题下列4个车标中，轴对称图形的个数为______。A.1个B.2个C.3个D.4个