单选题
Learning something new is, after all, what scientific experiments are all ______.
A. about
B. against
C. towards
D. around
A
B
C
D
【正确答案】
A
【答案解析】
This is what...is all about是个常见的句型，意义为“这就是……的全部目的或意义”，如：This is what teaching is all about.
提交答案
关闭