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【单选题】
对病毒衣壳的描述错误的是A.
由壳粒组成
B.
表面有刺突
C.
可介导病毒的感染性
D.
可抵抗核酸酶
E.
呈对称方式排列
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反馈参考答案：
举一反三
【单选题】Small cars are _____ of fuel, so they have more appeal for consumers. [ ]
A.
free
B.
short
C.
typical
D.
economical
【单选题】Why does Nigeria face chronic fuel shortages?
A.
Because the government sells most of the oil abroad.
B.
Because the country faces chronic difficulties in its oil production.
C.
Because the oil price is too low.
D.
Because the oil price is increasing.
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