挂灰烟叶形成的原因之一是()。
A. 采收烟叶成熟度不够
B. 烟叶变黄期烤房内温度忽低,上下波动严重,叶尖容易挂灰
C. 变黄阶段低温时问过短
D. 定色阶段时问过短
What problem do hippos cause in me park？
A lot of original animals died.
B. Too many people come to visit the park.
C. The balance of nature had been upset.
D. Birds disappear because of polluted water.
How many hippos are kept in Queen Elizabeth National Park now？
About 14,000.
B. No more than 14,000.
C. No more than 4,000.
D. About 4,000.
In the authors eyes, Seamus Heaney is a man of______.
A. short temper and quick tongue
B. moral integrity and uprightness
C. romantic temperament
D. severity and rigidity
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