系统软件和应用软件的相互关系是( )。A．前者以后者为基础B．后者以前者为基础C．

请根据材料内容，完成各题。

I study in Hongqing Middle School. The school is big and clean .There are 24 classes, 100 teachers and 800 students in it. There are two buildings in our school. (1)Our classrooms and teachers’ offices are in the buildings. There is a （2）__________ and a reading _______ in it. We often borrow (借)and read books there. I like my school very much. Welcome to our school.

请阅读短文，按要求完成下面的练习。

小题1:将（1）句译成中文：

________________________________________

小题2:在（2）句的空白处填入适当的词使句意完整、上下文通顺。（每空一词）

_________    __________

小题3:回答问题：How many people are there in the school? ________________________________________________________

小题4:找出与Our school has two buildings意思相近的句子。

___________________________________________________

小题5:从文中选出能表达该主题的句子。

______________________________________________________

常温下，下列叙述正确的是  [ ]

A．铅蓄电池放电时，电解质溶液的pH不断增大，而在碱性环境中的甲烷燃料电池工作时溶液的pH不变   

B．已知，醋酸的电离平衡常数大于苯酚电离平衡常数，则浓度均为0.1 mol·L^-1的

溶液和CH₃COONa溶液，<c(CH₃COO^-)

C．碳酸氢钠溶液中存在：

D．将稀氨水逐滴加入稀硫酸中，当溶液pH =7时， 

It was along the Mississippi River ______ Mark Twain spent much of his childhood _____ the story happened.

A. which; that         B. that; which           C where; that      D. that ;that

四川省推荐性地方标准代号为（）

A.DB11/T

B.DB32/T

C.DB50/T

D.DB51/T

即使没有造成对合法权益的损害后果，但只要有违法行为，就构成公安赔偿。 ( )