人工氧气释放工具参照检查单应该检查（）、位置准确。_爱下问搜题

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问题填空题

人工氧气释放工具参照检查单应该检查（）、位置准确。

答案

参考答案：数量

完形填空

第Ⅱ卷（共35分）
第四部分：写作（共两节，满分35分）
第一节：对话填空（共10小题，每小题1分，满分10分）
请认真阅读下面对话，并根据各题所给字母的提示，在标有题号的右边横线上写出一个英语单词的完整、正确的形式，使对话通顺。

D="David     " P=Peter
D: Peter , ten years ago you wanted to become a doctor . . .
P: Yeah , but unfortunately I didn’t (76)m       the requirements .
D: So what did you do then ?
P: Well , I was very (77) d       , but I just had to move on and do something else with my life . So I took a year off and worked as a volunteer on an aid program . That made me realize (78)h       important it is to raise money to help people (79)l       a poor life . So that’s what I do .
D: Can you explain a bit more about what you (80)a       do ?
P: I go to see people , put (81)f       our suggestion and organize activities to collect money .
D: So have you (82)a_____any of your goals ?
P: Well , I guess so . I always said I wanted to help (83)o       people .
D: And what about your plan for the (84)f       ?
P: My girlfriend and I intend to get married next year .
D: (85)C_____!

76.
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80.            81.
82.            83.
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计算题

老师在实验室制取二氧化碳时，称取含杂质的石灰石20 g ，加入50 g 稀盐酸，恰好完全反应。实验完成后经过滤、洗涤、干燥，得到固体 10 g ，假设石灰石中只有碳酸钙能与稀盐酸反应，求：

(1) 参加反应的碳酸钙的质量为____

(2) 所用稀盐酸的溶质质量分数是多少？