（）又叫偶然误差，它的产生是由一些随机因素造成的。
A.随机误差
B.粗大误差
C.系统误差
D.引用误差
参考答案：A
根据所给的图片，选出适当的单词。
1. This is a _____________. [ ]
A. car
B. ship
2. I can see two ______________. [ ]
A. planes
B. cars
3. Is this a ____________? Yes, it is. [ ]
A. ball
B. balloon
4. Look! I have a ____________. [ ]
A. kite
B. doll
爆温
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