古代人们在旷野地区常用“伏地听声”的办法来判断有无马群到来。这是应用了 ____

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问题:

古代人们在旷野地区常用“伏地听声”的办法来判断有无马群到来。这是应用了 _________ 的知识。

考点:声音的传播
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以下药物中杂质的检查方法是:葡萄糖注射液中的5-羟甲基糠醛().

A.紫外分光光度法 

B.热重分析法 

C.薄层色谱法 

D.分子排阻色谱法 

E.气相色谱法

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When I had something ______ to do,  I used to ask my mother for help. But she always _____ ,“ Do it yourself, dear.”I was not ______at all. I thought she was the _____ mother in the world! For example, one day, I decided to _____  some friends to my home. My bedroom was not in order(乱). Books were everywhere. And I didn’t make the bed. I ask my _____ to help me clean it, but she still said,“ Do it _____, girl.”
_______ my “lazy mother”, I have to wash my clothes and clean my room. I have to help my parents____. I even have to go to the dentist(牙医) by ____. It is really _____for me to do everything well, but I have learnt _____.
As time goes by, I ______ my mother. She makes me clever and diligent(勤奋).­_____  a great mother! A(An) _______mother is worth one hundred teachers! Don’t you think so?
小题1:
A.difficultB.gladC.goodD.happy
小题2:
A.spokeB.talkedC.saidD.asked
小题3:
A.oldB.gladC.thinD.sad
小题4:
A.tallestB.most foolishC.cleverestD.laziest
小题5:
A.leaveB.inviteC.visitD.take
小题6:
A.motherB.fatherC.brotherD.sister
小题7:
A.youB.yourC.yourselfD.yourselves
小题8:
A.asB.soC.becauseD.Because of
小题9:
A.do homeworkB.make moneyC.do houseworkD.work
小题10:
A.meB.themselvesC.myselfD.mother
小题11:
A.hardB.easyC.goodD.happy
小题12:
A.a littleB.a lotC.by mistakeD.many
小题13:
A.hateB.understandC.dislikeD.forget
小题14:
A.WhatB.HowC.WhoD.Which
小题15:
A.youngB.oldC.goodD.happy
题型:填空题

通道串扰

题型:填空题

下列有关票据方面的表述中,不正确的是( )

A.在我国,票据包括银行汇票、商业汇票、支票和银行本票

B.票据是由出票人依法签发的,约定自己或者委托付款人在见票时或指定日期向收款人或持票人无条件支付一定金额的有价证券

C.票据的签发、取得和转让,应当遵循诚实信用的原则,具有真实的交易关系和债权债务关系

D.我国的票据均为无记名票据,通过背书转让的方式均可予以流通转让

题型:填空题

当安装用的板料局部凹凸不平时,怎样矫正?

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