如图所示的台秤是称量物体质量的工具．使用前，应先将台秤放在水平面上，游码置于零刻度，先调节______使秤杆水平平衡，图示中被称量物体的质量是______kg．
使用前，将台秤放在水平面上，游码置于零刻度，调节调零螺丝使秤杆水平平衡．
秤杆每一个大格代表100g，每一个小格代表50g，游码对应的刻度值是200g=0.2kg．
物体的质量=砝码的质量+游码对应的刻度值=2kg+0.2kg=2.2kg．
故答案为：调零螺丝；2.2．
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| Do you like going to the movies? 1 of the students like movies very much. Last Monday I went to middle school and 2 some students about their favorite movies. Some of their 3 were really interesting. Here are their likes and 4 : Jim, 5 eleven-year-old boy, likes watching thrillers because they are scary 6 exciting. His classmate, Lisa, 7 stand documentaries. She told me they were 8 parents. But she really likes comedies because they are 9 . Victor is a big boy. He said he didn't mind documentaries. But he doesn't like comedies because they are boring! And the coolest movies are action movies. Everyone 10 them very much. | ||||
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