由第五段中的“In 2017,al the age 018..."可知,2017年,David 18 岁,所以,David出生于1999年;又根据第三段中的“When he was nine, he invented a special hat to keep cool.”可知,David九岁时发明了一顶特殊的帽子,由此推断他发明这顶帽子是在2008年。2. 细节理解题。由第五段中的“The arm ...
notes want. Besides, the notes are very cheap. The man who invented Post-it notes was Dr. Spencer Silver. He was trying to create a super strong glue. Instead he created a weaker glue by mistake. However, when he did that, he helped invent one of the world’s most useful office ...
When senior leaders at toymaker Lego first learned that adults were buying large quantities of their plastic bricks and getting together to build Lego creations of their own, “they thought it was very strange,” says Smith-Meyer. “Before the late 1990s, the company didn’t think their ...