—China is getting better and better at making high technology products.
—That's right. People around the world can hardly avoid ________ products made in China.
A：not buying
B：not to buy
C：to buy
D：buying
已知a→=（1，2），b→=（﹣3，2），ka→+b→与a→﹣3b→平行，则k的值为（ ）
