一、填空题(每小题2分,共20分)1·某食品包装袋上标有“净含量385克±5克”,这包食品的合格净含量范围是克~390克·2·一汽大众股份有限公司某年共销售轿车298000辆,用科学记数法记为辆·3·时钟在4点整时,时针与分针的夹角为度·4·实验证明,空气的成分按体积计算,各种气体所 First, fill in the blanks (2 points for each question, a total of 20 points) 1. A food packaging bag marked with “net content of 385 grams ± 5 grams”, this package food qualified net content range is ~ 390 grams · 2 · FAW-Volkswagen AG sold a total of 298,000 sedan cars in a certain year. It was recorded in scientific notation. • The clock was at 4 o’clock. The angle between the hour and minute hands was • 4 • Experiments proved that the composition of the air was by volume. Calculations, various gases