As a child, the author preferred playing outdoors with her peers to reading at home.
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Through books, the author learned about people as well as herself, her wishes and her dreams.
A. 对
B. 错
The author felt pessimistic about the decline of the reading population.
A. 对
B. 错
What were the challenges an avid reader was faced with in the author's time?
()的成分是蛋白质,抗原性好可以刺激机体产生抗毒素,不耐热毒性强。
A. 外毒素
B. 内毒素
C. 类毒素
D. 抗毒素