It can be inferred from the passage that __________. A．a stepladder used to have four legs.B．it is dangerous to use toolsC．a tripod is safer in a tool designD．workers are safer on production lines
It can be inferred from the passage that __________.
A、a stepladder used to have four legs.
B、it is dangerous to use tools
C、a tripod is safer in a tool design
D、workers are safer on production lines
发布时间：2025-11-13 08:00:14
