Dear Jane,

I’m in China now. The friends are all kind to me. We often go out for a picnic on Sundays. We take oranges, bananas and hamburgers with us. We take drinks like Coke and apple juice. We often go fishing and fly kites. We get some water and cook, too. We like cooking. We are all very happy. I’m very glad to be here.

Yours,

Lucy

根据短文内容，选择最佳答案。（10分）

小题1:The letter is from       .

A．Jane                 B．Lucy                 C．the friends

小题2:They take        with them.

A．apples               B．hamburgers           C．eggs

小题3:They drink       .

A．bananas              B．oranges              C．Coke

小题4:They don’t       .

A．sing some songs      B．go fishing               C．fly kites

小题5:      is glad to be in China.

A．Lucy             B．Jane                 C．the friends

阐述回收盐水含碱偏高或偏低对生产有何影响？