一、选择题(本大题共10小题,每小题4分,共40分)以下每题的四个选项中,仅有一个是正确的,请将表示正确答案的英文字母写在每题后面的圆括号内1.假定未拧紧的水龙头每秒钟渗出2滴水,每滴水约0.05毫升,现有一个水龙头未拧紧,4小时后,才被发现并拧紧,在这段时间内,水龙头共滴水约()(用科学记数法表示,结果保留两位有效数字).(考试时间:90分钟) First, the multiple-choice questions (the title of a total of 10 small questions, each question 4 points, a total of 40 points) of the following four options for each question, only one is correct, please write the correct answer to the English alphabet in each Inside the parentheses behind the question 1. Assume that 2 taps of water per second are tapped in an unscrewed faucet, about 0.05 milliliters per drop of water. The existing one tap is not tightened and was discovered and tightened after 4 hours. During this time, Faucet total drip about () (represented by scientific notation, the result retains two significant figures). (Test time: 90 minutes)