第4题:[单选题] [知识点:睡眠]可平衡精神和情绪,且有利于精力恢复的睡眠期是 A. REM期 B. NREM第Ⅰ期 C. NREM第Ⅱ期 D. NREM第Ⅲ期 E.NREM第Ⅳ期 参考答案:A
第5题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. He decided not to sell the piano. B. No one has bought the piano yet. C. He’s looking for a place to store the piano. D. He hasn’t been able to find an inexpensive piano yet. 参考答案:B 答案解析:[听力原文]
W: Hey, Mark. Have you been able to sell your old piano yet
M: Ah, You were right, just po