用PHP打印出前一天的时间格式是2020-5-10 22:21:21（ ）。 A: echo getdate(‘Y-m-d H:i:s’, strtotime(‘-1 days’)); B: echo date(‘y-m-d H:i:s’, strtotime(‘-1 days’)); C: echo date(‘Y-m-d H:i:s’, strtotime(‘-1 days’)); D: echo date(‘Y-m-d h:i:s’, strtotime(‘1 days’));

用PHP打印出前一天的时间，格式是2006-5-10 22:21:21。 A: echo date('Y-m-d h:i:s', strtotime('-1 days')); B: echo date('Y-m-d H:i:s', strtotime('-1 days')); C: echo date('Y-m-d h:i:s', strtotime('+1 days')); D: echo date('Y-m-d H:i:s', strtotime('+1 days'));

程序填空题：从键盘输入一个整数作为月份数，判断出该月份的天数。month =(input("请输入月份（1~12）："))if month ==2:days = "28或29天"elif month in [1,3,5,7,8,10,12]:days = "31天"else:days = "30天"print(days)

The secretary will contact you _____. A: for three days B: in three days C: about three days D: at three days

The required compressive strength of PCC is measured at A: 3 days B: 7 days C: 14 days D: 28 days

The entire project is scheduled to be completed within______. A: 784 days B: 748 days C: 478 days D: 487 days

The wedding ceremony of the Achang people lasts for _______. A: two days B: four days C: five days D: three days

-Good news. We will have a__holiday.-I've heard of it. But it's coming in____. A: three days; three days'time B: three days'; three days' C: three-day; three days D: three days; three-day time

The secretary will contact you _____. () A: for three days B: in three days C: about three days

The dog days of summer are the hottest days of the year.