What can we infer from the passage?
A.People tend to read some practical information with readers.
B.People prefer to take along some paper books with them when traveling.
C.Readers have not been accepted widely.
D.E-book companies are against paper books totally.
第5题
长期饥饿时,脑组织的能量来源主要由下列哪种物质供给()
A、血中游离脂肪酸
B、血中葡萄糖
C、肌糖原
D、酮体
E、肝糖原
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