对离子选择性电极的选择系数K的描述正确的是（）。 A.值越小表

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问题单项选择题

对离子选择性电极的选择系数K的描述正确的是（）。

A.值越小表明电极选择性越高

B.值越大表明电极选择性越高

C.值不直接用来衡量电极选择

D.值可准确估算共存离子的干扰程度

答案

参考答案：B

听力题

Dear Judy,

I’m glad to receive your email telling me your arrival time

and I’m really e to see you! I’m sorry that I will not 1____________

be able to meet you at the ________(机场) in person. I will be 2____________

(参加) a biology exam at that time. Don’t be worried. 3 ____________

I will a for a taxi to pick you up and send you to my 4_____________

house, _________you can have a good rest before I come back. I 5_____________

guess you may feel t after such a long journey. In the 6____________

evening, I’ll show you ________ the city square and have a look 7____________

at one of the most beautiful ___________(塔) in the world. The 8____________

next day, we’ll _________ a visit to the newly-built museum, in 9____________

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Yours

Jorge

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