: ؼ, ȣ ƽĶŽ!
fjrigjwwe9r3edt_lecture:conts

ƻƻ Ը ִ ƽĶŽ. ƽĶŽ ũ ƽĶ, Ÿ A, B1, B2, C, Į, Į, , ̼ dzϰ ִ.

ƽĶ 縦 ϰ ܹ ռ Ƿ ȸ ε, ƽĶŽ ᳪ 3-4質 ƽĶ ִ.

ƽĶŽ Ȱ ̴ ۿ, ȭ, ױ ۿ, ׿ ۿ, ۿ, ´.

ֱ ǥ ƽĶŽ ȭ ȣ شٰ Ѵ. ִ Բ ȭƮ ϴµ ƽĶŽ ϰ ٱ⿡ ҽŲٴ ̴.

ƽĶŽ ϰ ϸ ܴϰ Ⱑ ִ . Ʒ κ 3-5cm ߶ .

ٸ 丮 ־ Ծ ǰ ļ Ծ . ļ ұ ְ 1-2 ٰ Դ´.



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