2. BYOD actually started in the _______________ world in the mid to late 80s. (答案首字母大写)

When was the Yuantong Temple built? A: in early 8th century B: in mid 8th century C: in late 8th century

Which of the following periods involves the Golden Age of Hollywood? A: From 1895 to 1930 B: From 1930 to 1949 C: From the late 1920s to the early 1960s D: From the mid 1890s to the late 1920s

College usually begins on______. A: the first of September B: the first', September C: September one

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: $3$

If shipment is to be made during September/October，when should you ship the goods____ A: from September 1 to October 1 B: from September 1 to October 31 C: from September 30 to October 31 D: from September 1 to October 30

Could we postpone my visit to your office until the week commencing 5 September（） A: The visit will be delayed until someday after September 11th． B: The visit will be made someday from September 5th to September 11th C: The visit will be cancelled because of a meeting on September 5th．

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: $\mid A+B\mid=-1$

September

A)September 21. B) December 21. C) November 23. D) September 23.