题目内容
(请给出正确答案)
[单选题]
调节焦利氏称时,三线重合是指哪些线: When the Joule scale is adjusted, which lines are overlapped by three lines?
A.玻璃管上的标线 The marking line on glass tube
B.玻璃管上的标线在镜中的像 The image of the mark on the glass tube in the mirror
C.细金属杆上镜子的标线在玻璃管中的像 The image of the line of a mirror on a thin metal rod in a glass tube
D.细金属杆上镜子的标线 Marking lines for mirrors on thin metal rods
答案
玻璃管上的标线 The marking line on glass tube;玻璃管上的标线 在镜中的像 The image of the mark on the glass tube in the mirror;细金属杆上镜子的标线 Marking lines for mirrors on thin metal rods
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