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问题 单项选择题

在标准条件下（PCO2为40mmHg，温度为37℃，血红蛋白的饱和度为100％），用酸或碱滴定全血至pH为7．4时所需的酸或碱的摩尔数为（）

A.AB

B.BE

C.SB

D.BB

答案

参考答案：B

改错题

改错（每小题1分，共10分）

英语课上，老师要求同桌相互修改作文。假设以下小短文为你同桌所写，请你对其进行修改。短文中共有10处错误，毎句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（∧ ),并在此符号下面写出该加的词。

删除：把多余的词用斜线（\)划掉，

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1、每处错误及其修改均仅限一词。

2、只允许修改10处，多者（从第11处起）不计分。   

3、必须按答题要求做题。否则不给分。

I have been a friend with Li Ming since we go to primary school. He is one of my best friend. But last week something terribly happened to us. In Friday we had a maths exam. When I was busy check my answers, Li Ming whispered me for help. I felt very bad at that moment. We would cheat if I agreed. On other hand, we are good friends, so it was not easy for me to say "no" to my friend. Finally, I did not show her my answers. Though I explained my reasons after the test, but Li Ming didn't forgive me. How should I do?
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多项选择题

李某购买一套价格为100万元的住房，法定最低首付款比例为30%，住房公积金贷款最高额度为50万元，住房公积金贷款年利率为4.5%，商业银行贷款年利率为6.5%，贷款期限为10年。

关于李某贷款金额的说法，正确的为()。

A.最多可贷款70万元 

B.至少应贷款30万元 

C.住房公积金贷款最多50万元 

D.商业性贷款最少20万元
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