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已知向量 AB→=(1,0),AC→=(−2,3) ,则 AB→⋅BC→ =____.
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As the CEO and founder of Apple, Jobs hardly talked about his personal life in public. Here are some specific things.

1:Early life and childhood  Jobs was born in San Francisco on February 24, 1955. He was adopted(收养) shortly after his birth by a couple(夫妇) named Clara and Paul Jobs. He grew up in California. Later in life, Jobs discovered who were his birth parents. However, Jobs only had some communication with his birth mother.

2: College dropout After leaving high school, Jobs entered Reed College in 1972. Jobs stayed there for only one semester, because his parents couldn’t afford his education.

3: An important date Jobs actually missed a meeting because of his first date(约会)with his wife, Lauren Powell. He said, “I was in the parking lot (停车场)with the key in the car, and I thought to myself, ‘If this is my last night on Earth, would I rather spend it at a business meeting or with this woman? ’ I ran across the parking lot, and asked her if she’d have dinner with me. She said yes, we walked into town and we’ve been together ever since. ”

4:His sister is a famous author Later in his life, Jobs met up with his biological sister Mona Simpson, the famous author of Anywhere But Here.

5:His first daughter When he was 23, Jobs and his high school girlfriend Brennan had a daughter, Lisa Brennan Jobs. He and Brennan never married. Jobs paid for his first daughter’s education at Harvard. She graduated in 2000 and now works as a magazine writer.

    6:His fortune As the CEO of Apple, Jobs only took $1 a year, but Jobs leaves behind a vast fortune. In 2011, with $8. 3 billion, he was the 110th richest person in the world, according to Forbes.