问题 选择题

酸、碱、盐在工农业生产和日常生活中的广泛应用,促进了人类文明的进步和社会的可持续发展。下列有关酸、碱、盐的生产或应用的说法不合理的是 (     )

A.用石灰乳与硫酸铜溶液混合配制防治植物病害的波尔多液

B.纯碱既可从内陆盐湖提取,又可用“侯氏联合制碱法”生产

C.将草木灰(含K2CO3)与氯化铵混合施用

D.汽车或电动车的蓄电池中用到的硫酸溶液是由浓硫酸稀释而成

答案

答案:C

题目分析:A 波尔多液是氢氧化钙悬浊液和硫酸铜溶液混合而成;B 最早的纯碱是从内陆盐湖提取的,近代以来是用“侯氏联合制碱法”生产的;C草木灰(含K2CO3)的水溶液显碱性,和氯化铵混合使用会产生氨气,降低肥效;D 通常使用的稀硫酸都是浓硫酸稀释而来。

点评:本题属于对化学常识的考察,近几年中考加大了对化学常识记的考查力度,特别是和生活联系较为紧密的。

阅读理解

Wildwood School Library Guide

This will offer you some information about our school library.You can use this guide to help your kids use our library.

Service hours:

3:00 pm—5:30 pm on school days;8:30 am—11:00 am on weekends

On school days,your kids may borrow or return books during opening hours only when his classroom teacher allows him to.At the weekend,our library is open to both you and your kids.

Borrowing

Each student can borrow one or two books at a time:More books can be borrowed only for class reading activities and school research.

Returning:

Books borrowed from the library can be kept for 15 school days. The books must be returned before the due (到期的)date or the kid can not borrow other books.

Damaged(受损的)or Lost Books

When a book is returned in a damaged condition,the kid will have to pay three dollars for the damage.Full price must be paid if a book is lost. We encourage students to carry their library books in plastic bags to protect them from rainy weather.

Please call us at 3362—1323 for more information.

小题1:Students can borrow more than two books at a time__________.

A.for sending exams

B.to do school research

C.for after-school activities

D.to read together with their parents小题2:________must be paid when a student loses the book he borrows.

A.Three dollars

B.Half the price of the book

C.Full price of the book

D.Twice the price of the book小题3:The students are advised to _________to prevent rain.

A.carry their library books in plastic bags

B.cover their library books with raincoats

C.put their library books into their pockets

D.keep their library books in their classroom小题4:This library guide is for_______.

A.teachers from Wildwood

B.workers in Wildwood School Library .

C.visitors to Wildwood School

D.parents of the Wildwood School students小题5:Which of the following is NOT true?

A.The library is open for two and a half hours every day.

B.Students parents can go to the school library on weekends.

C.Students can go to the library during opening hours as they like.

D.Students can keep the books that they borrow for fifteen school days.

名词解释