- 2017年06月13日14:31 来源：小站教育作者：小站托福编辑
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TPO 38 L1
1. What does the professor mainly discuss?
A. Techniques for breeding unusual varieties of tulips in the Netherlands.
B. New types of plants introduced to Europe through trade.
C. The spread of plant diseases throughout seventeenth-century Europe.
D. The impact of a plant virus in the Netherlands in the seventeenth century.
Okay. Let's move on, to bacteria and viruses that can infect plants. And let's start out with a virus that's rather common in various plants but first became known in connection with tulips.