题干
— Did you buy the book A brief history of time by Stephen William Hawking?
—Yes. I ______ it since I entered the college. This is a best-seller.
A：have bought
B：have given
C：have had
D：have borrowed
答案(点此获取答案解析）
C
装入带活塞的密闭容器中，当反应
达到平衡后，慢慢压缩，下列叙述正确的是