The______ is one of the necessary instruments in the North Pole exploration.

猜你喜欢

• Among the four instruments introduced in the lecture，（）is simple to make and easy to carry？
• Which are accompaniments of musical instruments in Jingyun Dagu?
• Which musical instruments belong to the Mongolian Nationality?
• Which instruments belong to Uyghur Nationality?
• Which are common Huqin musical instruments in China?