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: $3$

A)July 26, 2007. B)July 27, 2007. C) July 28, 2007. D) Both A) and B).

-When is Mr. Zhang going to China? -On ( ). A: July B: July fifth C: the year 2011 D: July, 2011

What’s the date today A: It’s July 5. B: It’s July 6. C: It’s July 7.

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

When does the second course begin A: On July 3. B: On July 20. C: On July 24. D: On August 10.

Divide “july” into syllables: A: ju-ly B: ju-l-y C: jul-y D: july

We learn from the passage that the date of sowing cotton is usually______. A) on June 15th B) on July 15th C) on July 1st D) on July 20th

The law of compulsory education came into effect on _______, requiring each child to have nine years of formal education A: 1 July, 1975 B: 1 July, 1976 C: 1 July, 1978 D: 1 July, 1966

如果国外发来的信用证规定装运期为“ON/ABOUT JULY 20, 2017”，根据《UCP600》的相关规定，出口人的正确理解应该是（ ）。 A: 在JULY 20, 2017这一天出运 B: JULY 15, 2017至JULY 25, 2017一段时间内任何一天出运 C: JULY 16, 2017至JULY 14, 2017一段时间内任何一天出运 D: 在JULY 10，2017前的任何一天