准备试样，将试样移入注样器加上盖片，手握注样器，拇指按住盖片

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问题单项选择题

准备试样，将试样移入注样器加上盖片，手握注样器，拇指按住盖片，摇匀试样，在预定分析前10s将注样器倒立，松开（），将试样移入粒径计管内。

A、食指

B、小指

C、中指

D、拇指

答案

参考答案：D

填空题

根据句子内容完成已给了首字母的单词。

1. Tom asked me what that day was and I told him it was M______.

2. Mary i______ Tim to her birthday party but Tim couldn't, because he had lots of homework to do.

3. When I phoned Xiao Ming, he was playing s______.

4. We will go to the movie with our parents on W______.

5. Thank you for your invitation to visit, but I have to go to the d______. I have got a toothache.

6. You should write everything you have to do next week on the c______.

7. This Sunday I will have a p______ lesson. I'll learn some new music.

8. Mary can't go on a trip. She has to study for a g______ test.

问答题案例分析题

老李，50岁，农民。嗜酒多年，长期以玉米为主食。最近发现其面部和手背均出现皮疹，有些部位出现糜烂和结痂。他怀疑自己缺乏烟酸。

请写出纲要，并提出改善其烟酸营养的建议和对策。