The ______ of new inventions should be to make life easier, not to make it harder.
| A．rules | B．subjects | C．secrets | D．purposes |
The ______ of new inventions should be to make life easier, not to make it harder.
| A．rules | B．subjects | C．secrets | D．purposes |
试题篮
()
粤公网安备 44130202000953号
