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【单选题】
How large was the city of Derinkuya? It was over 60 meters deep-deep enough for a ____ building A. 20-story B. 200-story C. 30-story
A.
20-story
B.
200-story
C.
c. 30-story
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【简答题】We are lucky that we have as many _________ _________ of seals as we do.
【简答题】已知函数图像如图所示 :(1)根据图像写出定义域和值域;(2)写出函数的单调区间以及函数在各单调区间内的单调性.
【简答题】We are lucky to live in a rich country where we have many things. However, most of us usually some things. Electricity is one thing that we waste ____. Lights, TVs, and other things are often kept on ...
【简答题】试讨论下列函数在指定区间内的单调性: y=x+lnx RT,定义域是(0,正无穷)
【多选题】关于感光细胞说法错误的是( )
A.
视觉传递的三级神经元为光感受器细胞一水平细胞一神经节细胞
B.
视锥细胞外节呈圆锥状,视杆细胞外节呈圆柱状
C.
视锥、视杆细胞均包括内节、外节
D.
视杆细胞外节含视紫蓝质,视锥细胞外节含视紫红质
E.
视杆细胞司暗视觉和周围视觉
【判断题】在实际中,长距离输气管道的局部摩阻通常不单独计算,而是使水力摩阻系数增加15%,作为对局部摩阻的考虑。
A.
正确
B.
错误
【简答题】试证下列函数在指定区间内的单调性: ,(-∞,1).
【简答题】讨论下列函数在指定区间内的单调性: ,(-∞,1).
【单选题】We really got ripped off by that security company. This burglar alarm won’t work unless we are lucky or the burglar uses the front door, so we can’t count on it. I think we need a new alarm. Which of ...
A.
(1)
B.
(2)
C.
(3)
【多选题】关于感光细胞说法错误的是()
A.
视觉传递的三级神经元为光感受器细胞-水平细胞-神经节细胞
B.
视锥细胞外节呈圆锥状,视杆细胞外节呈圆柱状
C.
视锥、视杆细胞均包括内节、外节
D.
视杆细胞外节含视紫蓝质,视锥细胞外节含视紫红质
E.
视杆细胞司暗视觉和周围视觉
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