如果在一周内(周一至周日)安排四所学校的学生参观顺义啤酒厂,每天最多只安排一所学校,要求甲学校连续参观两天,其余学校均只参观一天,那么不同的安排方法有__________种(用数字作答).
She is nineteen, and next year she is going to celebrate her t birthday.
J 1st is Children′s Day.
The doctor told the patient to take the m three times a day.
Hearing the funny story,all the students began to l loudly.
Growing vegetables looks easy, but a it takes a lot of learning.