校园的公布栏上张贴了这样一则公告：由于气候较冷，各班暂停拖地_爱下问搜题

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问题填空题

校园的公布栏上张贴了这样一则公告：由于气候较冷，各班暂停拖地。目的防止水发生__________（填一种物态变化），避免使同学们摔倒受伤。南极科考队使用酒精温度计而不是水银温度计，是由于酒精的__________低。

答案

凝固，凝固点

完形填空

When you wave to a friend, you are using sign language. When you smile at someone , you mean to be 16 . When you put one finger in front of your 17 , you mean“Be quiet.”
Yet , people in different countries may use different sign languages.
Once an Englishman was in Italy. He could speak 18 Italian. One day while he was walking in the street , he felt 19 and went into a restaurant. When the waiter came , the Englishman 20 his mouth , put his fingers into it and took them out again and moved his lips. In this way , he 21 to say , “Bring me something to eat.”But the waiter brought him a lot of things to 22 . First tea , then coffee , then milk , but no food. The Englishman was 23 that he was not able to tell the waiter he was hungry. He was 24 to leave the restaurant when another man came in and put his hands on his stomach. And this sign was 25 enough for the waiter. In a few minutes, the waiter brought him a large plate of bread and meat. At last the Englishman had his meal in the same way.

单项选择题

《中华人民共和国建筑法》规定，建筑活动应当确保建筑工程()，符合国家的建筑工程安全标准。

A．工期和安全

B．工期和质量

C．安全和质量

D．成本和安全