Compared to earlier stone tool industries, what kind of tool begins to become much more frequent in the Middle Paleolithic/Middle Stone Age?
A: Bone points
B: Bifacially-flaked tools
C: Hand axes
D: Prepared core tools
A: Bone points
B: Bifacially-flaked tools
C: Hand axes
D: Prepared core tools
举一反三
- The stone chip is thought to be the most important tool because it ______. A: was one of the first tools B: developed human capabilities C: led to the invention of machines D: was crucial to the development of mankind
- The "New Stone Age" around 10,000 years ago saw the invention of metal tools and the wheel.
- The speaker states that the Stone Age was so named because ______. A: it was very durable B: the tools and weapons were made of stone C: there was little vegetation D: the people lived in caves
- Compared with ordinary CNC machine tools, the most significant difference between a machining center is ( ) and ( ). A: servosystem B: magazine tool C: numerical control device D: automatic tool changer
- Rolls-Royce is world famous for（） A: machine tools B: household appliances C: luxury automobiles D: high-quality knives and hand tool