— _____ around the world is to learn about the world.
— Yes, it's a good way ____ the world.
A:To travel; to know
B:To travel; know
C:Travel; to know
D:Travel; know
电路的基本组成包括____、____、导线和开关;电路的基本连接方式包括____和____两种.
“西域的葡萄、核桃、良马、地毯等传入内地,丰富了汉族的经济生活,汉族的铸铁、凿井、开渠等技术和丝织品、金属工具等传到了西域,促进了西域的经济发展。”
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