2. 外语
  3. The passage gives a general description of an invasive insect, HWA. The Hemlock in the U.S. will be saved from HWA soon.

The passage gives a general description of an invasive insect, HWA. The Hemlock in the U.S. will be saved from HWA soon.

admin2009-09-12  29
问题 The passage gives a general description of an invasive insect, HWA.
The Hemlock in the U.S. will be saved from HWA soon.
选项 A、Y
B、N
C、NG
答案C
解析 文章后半部分讲到为了控制HWA，美国已在受灾部分地区投放HWA的天敌St bettles，但是在文章倒数第二段末尾指出这种方法是否有效还无法判断(too early to measure their impact)，故本题表述正确与否未可知。
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大学英语四级

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