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【单选题】
吗啡产生欣快感与哪个位置的阿片受体有A.
外周
B.
第三脑室和中脑导水管周围灰质
C.
蓝斑核
D.
孤束核
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】By stating 'I could have had my eyes closed' the author means (Line 7, Para. 3, last sentence) ______.
A.
the third baseman would rather sleep than play the
B.
the author could close his eyes without watching the , because it was always the same.
C.
the third baseman is no good at baseball that he could finish the with eyes closed all the time and do his work well
D.
the consequence was too bad he could not bear to see it
【简答题】Para 7 ______.
【简答题】梁通常承受 和 的共同作用,是以弯曲为主要变形的构件。
【简答题】Para 7 ______