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注:所有计算中一律取g=10N/kg一、选择题(每小题3分,共45分)请在下列每个题目中选出一个符合题意的答案,将答案前的字母填在题后的括号内。1.如果18.40cm是下列某个物体的长度,则它是:()A.书桌的宽度。B.物理课本的宽度。C.一只乒乓球的直径。D.中学生手掌的宽度。2.某同学用同
Note: All calculations should take g=10N/kg. Multiple-choice questions (3 points for each question, a total of 45 points) Please select one of the following answers for each question. Fill in the letters before the answer. In parentheses after the question. 1. If 18.40cm is the length of an object, it is: () A. The width of the desk. B. The width of the physics textbook. C. Diameter of a table tennis ball. D. The width of the middle school student’s palm. 2. A classmate used the same