请你对下列光学仪器归类：a近视眼镜；b老花眼镜；c防盗门上的“猫眼”；d照相机镜
题型：填空题
问题：
请你对下列光学仪器归类：a近视眼镜；b老花眼镜；c防盗门上的“猫眼”；d照相机镜头．
（1）类：______
（2）类：______．
题型：填空题
The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.
If 
is a positive integer, what is the value of r ？（）
(1) r＜70
(2) [*]
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.