设有两个命题p：不等式|x|+|x－1|≥m的解集为R；q：函数  $f\left(x\right)=-(7-3m{)}^x$是减函数.若这两个命题中有且只有一个真命题，求实数m的范围.

We realized how much ____ after watching these documentaries．

今日中国面临着就业形势严峻、人口老龄化带来的社会保障问题等严峻考验。回顾历史，新中国成立初期，***和中国人民面临的最严峻考验是（    ）

阅读短文，判断下列句子分别符合A、B、C哪一项。

    Hello! My name is Jack. I'm eleven. I'm a student. I study in the Fifteenth Primary School. I'm in Class 4, Grade 5. There are 45 students in my class. They are 22 girls and23 boys. We have English, Chinese, maths and other subjects.

    This morning I was the first one to get to school.John was the second one. Ann and Amy were the third and the fourth. We are in the same class. We have English lessons in the sixth classroom. Our classroom is on the fourth floor of our school building.