题目内容

下列叙述中属于系统误差规律的是（）。

A. 确定的原因引起
B. 有一定方向性
C. 重复测定重复出现
D. 大误差出现的概率比小误差的小

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提高分析结果准确度的方法有（）

A. 选择恰当的分析方法
B. 减小测量误差
C. 减小偶然误差的影响
D. 消除测量中的系统误差

Activity 2Fill in the blanks with the proper forms of words given in the brackets.1. ___(social) is the foundation on which human societies are based.2. What a _(terrify) experience!3. He took up_(resident) in America.4. QUANJUDE Peking Roast Duck was one of the (theme) restaurants in China since1864.5. It is necessary to overcome _____(shy) at school.

Activity 3Grammar: Fill in the blanks with the proper forms of words given in the brackets.1. They(are) absent from school two days ago.2. I (buy) a gift for my mum yesterday.3. (plant) trees makes our environment better.4. (watch) too much TV does harm to our eyes.5. (not arrive) on time can be a form of avoidance.

空间上的点用（）表示。

A. 小写字母
B. 大写字母
C. 数字
D. 字线加括号