The number of students participating in online courses varies .
A: year to year
B: year and year
C: year by year
D: year on year
A: year to year
B: year and year
C: year by year
D: year on year
举一反三
- The number of students participating in online courses varies ____________. A: yearly B: year in and year out C: year to yea D: year after yea
- This year is the year of Gengzi, and next year is the year of ___________.
- 21（） A: next year B: that year C: this year D: by year
- 判定year是否为闰年的表达式是 A: year % 400 == 0 or year % 4 == 0 and year % 100 <> 0 B: year % 400 == 0 or year % 4 == 0 , year % 100 != 0 C: year % 400 == 0 or year % 4 == 0 and year % 100 != 0 D: year % 400 == 0 or year % 4 == 0 , year % 100 <> 0
- 使用变量year代表年份，以下表示判断year是否为闰年的布尔表达式是 。 A: (year % 4 == 0) and (not(year % 100 == 0)) or (year % 400 == 0) B: (year % 4 == 0) and (not(year % 400 == 0)) or (year % 100 == 0) C: (year % 4 == 0) and (year % 100 == 0) or (year % 400 == 0) D: (year % 4 == 0) or (not(year % 100 == 0)) and (year % 400 == 0)