光线进人眼内,成像于眼球的哪一结构
A.角膜
B.晶状体
C.玻璃体
D.视网膜
答案:D
题目分析:物体的图像投影在视网膜上,视网膜上分布着许多对光敏感的感光细胞,从而形成物象。
I’m new here. Could you please tell me ________ ?
A.what is the building used for
B.when does the first class begin
C.where is the dining hall
D.how many classes our school has
1, 11, 21, 31, ( )
A.39
B.41
C.51
D.49