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单选题

A．By controlling the carriers of the disease.
B．By growing a stronger kind of the elm.
C．By watering infected elm trees.
D．By cutting down all infected elms.

参考答案A

解析:According to the speaker，how do experts hope to limit the spread of the disease in the future?
细节题。根据Now experts are trying to get to the root of the problem，they are workin9011 ways to control the beetle that spreads the disease．可知科学家们要从根源上控制传播疾病的虫子。因此，正确答案是A。

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单选题

A．They painted in their spare time.
B．They lacked formal art training.
C．They used a more traditional approach to color.
D．They followed rules established by art schools.

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单选题

A．They lack bright colors.
B．They are realistic depictions.
C．They follow ancient traditions.
D．They are inferior to French naive paintings.

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单选题

A．Their works were unsigned.
B．Many of their works were destroyed.
C．They never stayed in one place for a long time.
D．They worked for only a few years.

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