The explorers _________ on the island as early as the fifteenth century.

It’s celebrated ____ the fifteenth of August of the lunar calendar.

已知三阶矩阵$A$满足$\mid A-E\mid=\mid A-2E\mid=\mid A-3E\mid=0$，则$\mid A\mid$=( )。 A: $4$ B: $6$ C: $12$ D: $3$

设$A,B$是$n$阶正交矩阵，且$\mid A\mid=-\mid B\mid$，则( ). A: $A+B$可逆 B: $A+B$不可逆 C: $\mid A+B\mid=1$ D: $\mid A+B\mid=-1$

The Christmas tree tradition was started in Germany in the late fifteenth century

It's celebrated ____ the fifteenth of the 8th month of the lunar calendar. A: on B: in C: at D: to

When is the Dragon boat Festival? A: It'son the fifteenth day of the eighth month on the Chinese lunar calendar. B: It'son the fifteenth day of the first month on the Chinese lunar calendar. C: It'son the fifth day of the fifth month on the Chinese lunar calendar.

Excel2010从18份身份证号中获取出生日期可以使用（）函数。 A: MID(A1,6,8) B: MID(A1,7,8) C: =MID(A1,6,8) D: =MID(A1,7,8)

船舶电台海上移动业务识别码的组成是( )。 A: MID X1X2X3X4X5X6 B: 0 MID X1X2X3X4X5 C: 00 MID X1X2X3X4 D: 00 MID X1X2X3X4X5

Before the development of movable metal type in the mid-fifteenth century, news was disseminated by word of mouth, by letter, or by public notice. A: organized B: requested C: distributed D: limited