单选题 Which of the following statements about plastic face masks and plastic pollution is TRUE?
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单选题 Why had footage of some animals hardly been seen since the 1990s in Qinghai Province?
单选题 What is the citizen's attitude towards the wild environment in Para. 5?
单选题 What is a "vulnerable" animal?
单选题 Which word from Para. 2 helps you understand that the asteroid event was an extremely long time ago?
单选题 What does the new study in the journal Science suggest?
单选题 Why was the whale's visit a rare occurrence?
单选题 Which answer choice is the BEST definition of the underlined word "flourished" as used in the last sentence of Para. 3?
单选题 What can be inferred from the last paragraph?