1 . Stephen Hawking’s wheelchair is a symbol of physical challenges he faced, and also the ________ (力量) and determination he had to beat them. (根据汉语提示单词拼写)

2 . There are no ________(官方) rules regarding passport colors, but countries follow a certain set of norms when designing them. (根据汉语意思单词拼写)

3 . Last month, they signed an ____________ (官方的) cooperation agreement to jointly build a digital rural leading area in Zhejiang province. (根据汉语提示单词拼写)

4 . Rock climbing, especially free soloing is a great ________(冒险), which involves a relatively high risk of injury, even death. （根据汉语提示单词拼写)

5 . There is clear ________ (证据) that children who take music lessons develop a better memory compared with children who have no musical training. (根据汉语提示单词拼写）

6 . With the rapid progress development of artificial ________ (智能，智慧), our life in the future is sure to be totally different from today. (根据汉语提示单词拼写）