酸洗时，在浸泡或循环过程中，应每隔（）在取样点取酸液化验一次_爱下问搜题

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问题单项选择题

酸洗时，在浸泡或循环过程中，应每隔（）在取样点取酸液化验一次浓度。

A、0.5h

B、1h

C、2h

D、3h

答案

参考答案：A

完形填空

My daughter and I went out for some shopping．While I was waiting to    ，my daughter asked if she could wait for me at the door．
Minutes later she returned to ask if she could give the     she had just bought to a man in the street, so there she went and     her sweets away．Another 2 minutes later, she   again to ask me for something else she could give to the man．I told her that I only had some biscuits for dessert，so she took them to the man and came back with a huge    on her face．
When we got out of the shop I       that the “man”was an old man in his 80's．It tooked like he was going to    the night there. We made eye contact(接触)and he thanked us a lot．
On the way to the parking lot my daughter wanted to buy a drink for the old man, but I had no   ．So I went to the cash machine，took some cash and my daughter gave it to the old man，so he could buy a drink．My daughter was over    when she came back from the old man．
It was probably my daughter's first random act of    ，and that was amazing．

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