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【单选题】
关于视杆细胞的叙述，错误的是A.
其感光色素为视紫红质
B.
主要分布在视网膜的周边部分
C.
不能分辨颜色
D.
对物体有高分辨能力
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反馈参考答案：
举一反三
【简答题】结构净高是指()至()之间的垂直距离。
【简答题】A．students B．teachers C．deaf D．Shirley
【单选题】She likes _______. She is a good _______. [ ]
A.
swim, swimming
B.
swimming, swimmer
C.
swimmer, swimming
D.
to swim, swim
【单选题】听力原文：M: I have a special guest today, Shirley. Shirley, you truly have an amazing garden. Could you [et us know how you put this together? W: Tills spring I took a square-foot gardening class, and I d...
A.
By attending a class.
B.
From her parents.
C.
Through a gardening magazine.
D.
From her neighbors.
【单选题】支气管哮喘最典型的临床表现是 A.留清鼻涕,连打喷嚏 B.发作性吸气性呼吸困难 C.混合性呼吸困难 D.端坐呼吸 E.发作性呼气性呼吸困难
A.
。
B.
.
C.
..
D.
...
E.
....
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