如果真空断路器的位置闭锁杆没有打下，仍处于可移动位置就对其进行选线合闸，会有（）的后

高速公路收费站于开始对过往的超载货车实施计重收费，某同学结合所学物理知识设计了如图所示的计重秤原理图，以下说法正确的是（　　）

A．称重表相当于一个电压表

B．电路中的R₁是没有作用的

C．当车辆越重时，称重表的示数越小

D．当车辆越重时，称重表的示数越大

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

Do you like travelling? Staying   小题1:  (health) while   小题2:  (travel) can help to ensure your trip is a happy and enjoyable one.   小题3: you are travelling abroad, here are the tips you need to make your trip much   小题4: (easy)

Make sure you have got signed passport(护照) and visas. Also, before you go, fill in the emergency information page of your passport! Make two copies of your passport identification page. This will help a lot if your passport   小题5:  (steal). Leave one copy at home with friends or relatives. Carry the other   小题6:  you in a separate place from your passport.

Read the Public Announcements or Travel Warnings for the countries you plan to visit. Get yourself familiar with local laws and customs of the countries to   小题7:  you are travelling.

Leave a copy of your itinerary(旅行日程) with family or friends at home so that you can be contacted in case of an emergency.

Do not accept packages from strangers. Do not carry too much money or   小题8:(necessary) credit cards. If we make enough 小题9:(prepare), we will succeed. Have   小题10: good time!

下面是用温度计测量热水温度的实验步骤，试将这些步骤按正确的顺序排列：______

A．先用手估测热水的温度 

B．选取适当的温度计

C．记录温度的估计值    

D．观察温度计的液柱示数处于稳定状态

E．把温度计插入热水中，并使玻璃泡全部浸没在水中，但不与器壁接触

F．读出温度计的示数，并记录在表格中

G．整理仪器．

在插制三角形轮廓时，其正前方一枝应是第一主枝的（）。

A.1/2

B.1/3

C.1/4

D.1/5

检查评比一般以（）为主要内容和标准。

A.“四会”和“三无”

B.“四会”和“四无”

C.“三会”和“四无”

D.“三会”和“三无”