【单选题】For each pair of sentences provided, select the better version .
A.
As reported by Chasse et al. (17), tissue samples were collected within 30 min of organ removal, flash-frozen in buffer A, and stored at -80°C until further use.
B.
Tissue samples were collected upon organ removal as reported by Chasse et al. (17).
【简答题】Mary likes to invent things. She creates a new language and teaches it to her friend, Jean. Mary and Jean like to talk to each other in their own language because they think no one understands them an...