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问题
填空题
当今科技活动最直接、最经常、最主要的方式是指（）。
答案
参考答案：合作
选择题
看图，选出相对应的句子。
( ) 1.
A. She is putting his pencils in his pencil case.
B. She is reading a book.
( ) 2.
A. He is writing on the paper.
B. He is writing on the blackboard.
( ) 3.
A. He is playing ping-pong.
B. He is singing a song.
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判断题
401.0精确到十分位，有三个有效数字。[ ]
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