读局部地区示意图，回答下列问题．

​

A

    Skin­diving is a new sport today. This sport takes you into a wonderful new world. It is like a visit to the moon. When you are under the water, it is easy for you to climb big rocks, because you are no longer heavy.

    Here, under the water, everything is blue and green. During the day, there is plenty of light. When fish swim nearby, you can catch them with your hands.

When you have tanks of oxygen on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water.

    To catch fish is one of the most interesting parts of this sport.

    What's more, there are more uses for skin­diving. You can clean ships without taking them out of water. You can get many things from the deep sea.

    Now you see that skin­diving is both useful and interesting.

    （甲）王曰：善。乃下令：群臣吏民，能面刺寡人之过者，受上赏；上书谏寡人者，受中赏；能谤讥于市朝，闻寡人之耳者，受下赏。令初下，群臣进谏，门庭若市；数月之后，时时而间进；期年之后，虽欲言，无可进者。

    燕、赵、韩、魏闻之，皆朝于齐。此所谓战胜于朝廷。

    （乙）厉王虐，国人谤王。召公告曰：“民不堪命矣！”王怒，得卫巫，使监谤者。以告，则杀之。国人莫敢言，道路以目。王喜，告召公曰：“吾能弭①谤矣，乃不敢言。”召公曰：“是鄣②之也。防民之口，甚于防川；川雍③而溃，伤人必多。民亦如之……”

王弗听，于是国人莫敢出言。三年，乃流王于彘④。

（《国语·召公谏厉王止谤》节选）

【注】①弭（mǐ）：消除。②鄣：阻塞。③壅（yōng）：堵塞。④彘（zhì）：晋地名，在今山西省霍县。

如图，把左边的图形折起来得到正方体，则下列正方体一定正确的是（　　）