Questions 18 to 20 are based on the following passage. ______is the driving force of the formation of a typhoon.

Listen to the following passage. Altogether the passage...

问答题

Why does the man want to visit New MexicoA. To study th...

单项选择题Why does the man want to visit New Mexico

Where could people see clocks in the late 1700sA. In ri...

单项选择题Where could people see clocks in the late 1700s