题目内容

Cloze 2. Theme-relatedRead the passage care­fully untilyou have got its main idea, and then select one appropriate word for each gap from the box fol­lowing the passage.Statistics show that at some point in your life, you will get robbed.Things get even worse for apartment dwellers (居住者)because so many people pass in and out of an apartment building, and it is much (1) to keep non-residents out.So what to do? Don't panic. Yes, apartments are________ (2)to robbery, but there are options other than barricading yourself in your apartment with a shotgun. We suggest that you use some common sense to (3) that target from your door. Then the burglar will rob the less guarded, not you.We know what you're thinking: "I'll never get robbed. Who'd want to steal a half can of Diet Coke and an_______________________________________ (4) toothbrush?”If those really are the only things in your apartment, you have every reason not to worry. However, if you have something you'd like to keep 一 say, a TV, a stereo, a computer, a Picasso 一 it's wise to be (5).Your goal is not to set up any________________ (6) security systems to hold _____ (7) at bay; your goal is to keep crimi­nals from even trying to________ (8) into your apartment in thefirst place. If someone really wants to break in,_________ (9) are that he/she is going to find a way by breaking a window or climbing up the fire escape. Therefore, you should remove all (10) that say,“Hey, look at me! Lots of goodies and no security! Come on in!" Lock the door when you leave. Don't leave the windows open all day long. Don't tape notes on the door directed to your mate reading "Gone all day! Left the door unlocked for you!" Just use your brains!A.signs B. cautious C. chances D. electronicE.systems F. thieves G. shift H. liableI.barriers J. tougher K. sophisticated L. electricM.universal N. threaten O. break

查看答案
更多问题

如下关于不可压缩流体在简单管路内稳态流动时的说法,错误的是( )

A. 通过各个管截面的体积流量相同
B. 通过各个管截面的质量流量相同
C. 由于机械能损失,管截面上的压强从上游至下降逐渐降低
D. 整个管路的机械能损失等于各管段机械能损失之和

通过一段简单管路把液面恒定的高位水槽内的水放出,管路上有一阀门。当开大阀门时,整个管路的机械能损失()(设动能项可忽略。)

A. 增大
B. 减小
C. 不变
D. 无法确定

在某一管路系统中,流体从总管1流向两并联的支路2和3,汇合后再经总管4流出,则流体流经整个管路的机械能损失可表示为( )。

A. hf=hf1+hf2+hf3+hf4
B. hf=hf1+hf2+hf4
C. hf=hf1+hf2
D. hf=hf3+hf4

如图所示的简单管路,现将阀门开度减小,试定性分析阀门前压力表读数pA()。

A. 减小
B. 不确定
C. 不变
D. 增大

答案查题题库