有关合同文件优先级的描述中正确的有（）。A.合同协议书及各种合同附件的优先级最高 B
题型：多项选择题
问题：
有关合同文件优先级的描述中正确的有（）。
A.合同协议书及各种合同附件的优先级最高
B.公路工程专用合同条款的优先级高于项目专用合同条款
C.中标通知书的优先级高于合同协议书和通用合同条款
D.通用合同条款的优先级高于图纸和已标价工程量清单
E.技术规范优先级高于图纸和已标价工程量清单
题型：多项选择题
Put an ice cube from your fridge into a glass of water. You have a piece of string(线) 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.
You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment.
First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt(融化). The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze again. After a minute or two you may raise the piece of string and with it you will raise your piece of ice!
This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don’t put enough salt, the water will freeze again.
小题1: We must use _______ when we carry out this experiment.
A．fridge
B．some food
C．a table
D．some salt小题2: How long will it take to carry out this experiment?
A．More than three minutes.
B．Five minutes or so.
C．Only one minute or two.
D．About ten minutes.小题3:What is the task of this experiment?
A．Put the ice cube into the glass of water with the help of the string.
B．Take out the ice cube in the glass of water with the help of the string.
C．Take out the ice cube in the glass of water with your fingers.
D．Put some salt on the ice cube and then put the string across it.小题4:How many things at least are used in this experiment?
A．Three.
B．Four.
C．Six.
D．Seven.小题5:We can learn something about _______ from the passage.
A．physics
B．biology
C．chemistry
D．maths
