题目

SECTION B Directions: Read the following passage. Answer the questions according to the information given in the passage and the required words limit. Write your answers on your answer sheet.                     High School In America After middle school comes high school, which includes grades 9 through 12. Students are required to take certain subjects like English, social studies, math, science, and physical education. In addition, they choose among elective subjects (选修课程) to complete their high school education. Electives include subjects in technology, music, 在调节天平平衡时,首先将游码游码移到标尺左端的零刻度线处,然后发现指针位置如图甲所示,应将平衡螺母向左左调;天平平衡后,先测得一个空杯质量为14g,取40mL某液体倒人该杯中放在天平左盘,当右盘所加砝码和游码位置如图乙所示时.天平又平衡,则杯子和液体的总质量是62.462.4g,液体的密度是1.21×1031.21×103kg/m3.
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