妊娠期妇女治疗口腔疾病的适宜时期是（） A.妊娠初期（1～3个月） B.妊娠中期（4

下面不属于WPS Office 2007特色功能的是（）

A.支持实时预览

B.特有的“文字工具”功能可让用户快速完成文档排版

C.可将文档设置为“稿纸版式”

D.文档中的图片可直接保存

两速调速器的作用是稳定怠速，限制发动机最高转速不致飞车。

语法填空

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空.

     In every school a "top" crowd sets the pace,while the others follow their lead.Let's say the top crowd

decides that it is smart to wear bright red sweaters.Pretty soon everybody is wearing __1__bright red

sweater.There is nothing wrong with that,__2__the fact that on some people a bright red sweater is

__3__(extreme)unbecoming.The situation can even become dangerous,if the top crowd decides that it is

smart to drink or to drive cars at seventy miles an hour.Then the people __4__(follow) the lead are

endangering their lives.They are like the sheep being led to the butcher.Now,chances are __5__you have

come across situations like these more than once in your life；chances are that one time or __6__you

probably did something you knew to be wrong.You may __7__(excuse)yourself by saying,"Gee,the

crowd does it."Well,let the crowd do it,__8__don't do it yourself.Learn to say,"No."

     Develop your own standards and your own judgment.__9__you know the crowd is planning

something you __10__(agree)with,have the courage to bow out politely.You'll have the satisfaction of

standing on your own two feet.

人机系统中，机器优于人的能力包括( )。

A．信号检测、图像识别

B．灵活性、随机应变

C．推理、判断

D．反应、操作速度快

下列有关生物多样性与生物进化的叙述中，不正确的是（）

A.细菌在接触青霉素后会产生抗药性的突变个体，青霉素的选择作用使其生存

B.蜂鸟细长的喙与倒挂金钟的简状花萼是它们长期共同进化形成的相互适应特征

C.异地新物种的形成通常要经过突变和基因重组、自然选择及隔离三个基本环节

D.自然选择能定向改变种群的基因频率，决定了生物进化的方向