再次侵染（secondary infection）
参考答案：
在田间已发病的植株上产生的病原物传播扩散后侵染同一生长季内的寄主植物，称作再次侵染。
被除数是39.6，除数是11，商是多少？
What’s not true about Trust-mart().
A. It’s a Taiwanese supermarket chain.
B. The world largest retailer has agreed to buy Trust-Mart.
C. Wal-Mart will buy Trust-Mart for 1 billion yuan.
D. Buying Trust-Mart will make Wal-Mart the biggest food and department store network in China.
