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【简答题】
阅读理解 Table manners in America Don't circle your plate with your arms. If you do so, you will become the focus  (焦点)  of the table. Everyone would wonder, 'Is there anything wrong with the food?' This may give a wrong message that you don't like the food or something like that. Don't push the plate back when finished. Leave it where it was. Do you want to let the hostess (女主人)know that you've just done a labour? Don't lean (倚靠) back and say 'I'm through' or 'I'm full'. Just put the fork and knife across the plate. That's all. Don't cut up everything before you start to eat. Cut only one or two bites (块) at a time. Never take a huge mouthful of anything. Do you want to show how hungry you are? Don't do that. It's not so good. It's never good to reach across the table for anything. If the thing you want is not at hand, simply ask the nearest person for help, like 'Mrs. Smith, could you pass me the dish?' 1. If you are at table and circle your plate with your arms, other people will think ____. A. you don't like the food B. the food isn't good for you C. there is something wrong with the food D. all above 2. After finishing dinner, you should ______. A. put the fork and knife across the plate B. stand up and leave the table C. say 'I'm full' D. say 'Thank you' 3. If you want a dish far from you at table, you should _____. A. stand up and reach across the table for it B. leave your seat to get it C. sit there until others help you D. ask the nearest person for help
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参考答案:
举一反三
【单选题】信号f1(t)和f2(t)的波形如题4图所示,设y(t)=f1(t)*f2(t),则y(4)等于【图片】
A.
3
B.
2
C.
4
D.
5
【单选题】建设工程施工合同示范文本中,工程师无权指示设计变更的情形是( )。
A.
减少合同中约定的工程量
B.
改变有关工程的施工时间
C.
删除承包范围内的部分工作
D.
更改工程有关部分尺寸
【简答题】建设工程施工合同示范文本主要有哪些合同文件组成?
【判断题】逻辑电路如图(a) 所示,若各输入信号波形如图(b) 所示,则Q1、Q2的波形如图(c) 所示,对吗?假设两个触发器的初始状态均为0。【图片】【图片】【图片】
A.
正确
B.
错误
【单选题】晶体管放大器混频电路和晶体管的转移特性如图所示,gm为晶体管的交流跨导,已调波us= uDSB= UsmcosWtcoswct,本振信号ul= Ulmcoswlt,Ulm>> Usm,中频频率wi= wl- wc,直流偏置电压UBB= UBEQ= UBE(on)。以下分析中错误的是( )。【图片】
A.
时变静态电流的波形如图所示
B.
时变电导的波形如图所示
C.
混频跨导 g c = g m / p
D.
设 LC 并联谐振回路的谐振频率 w 0 = w i = w l - w c ,带宽 BW BPF >> 2 W ,则 中频信号为
【单选题】两个信号波形如图所示。设【图片】,则y(5)=( ).【图片】
A.
2
B.
4
C.
6
D.
8
【单选题】皮亚杰的认知发育阶段中,主要通过感觉动作来认识外部世界的阶段是
A.
感知运动阶段
B.
前运算阶段
C.
具体运算阶段
D.
形式运算阶段
E.
以上都不对
【判断题】现行的建设工程施工合同示范文本是《建设工程施工合同(示范文本)》(GF-2017-0201)。 ( )
A.
正确
B.
错误
【单选题】信号【图片】,【图片】波形如图所示,设【图片】,则【图片】为()。【图片】
A.
1
B.
2
C.
3
D.
4
【单选题】信号【图片】,【图片】波形如图所示,设【图片】,则【图片】为【图片】
A.
1
B.
2
C.
3
D.
4
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