表达式'abc' in ('abcdefg')的值为True。
A. 对
B. 错
表达式'abc10'.isdigit()的值为True。
A. 对
B. 错
表达式'aaasdf'.strip('a')的值为 ' ' 。
What was the author's primary purpose for writing this text?
A. to entertain us with the story of Dan and Steve
B. to persuade us that genetic testing is best
C. to inform us about how our genes caninfluence our lives