某慢性肺心病人已出现颈静脉怒张、肝大、肝颈静脉回流征(+)、腹_爱下问搜题

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问题单项选择题

某慢性肺心病人已出现颈静脉怒张、肝大、肝颈静脉回流征(+)、腹腔积液、下肢浮肿，何故

A．门静脉高压
B．低蛋白血症
C．右心衰竭
D．心包积液
E．慢性肝炎

答案

参考答案：C

选择题

Ten years ago the population of our village was ______ that of theirs.

A．as twice large as

B．twice as large as

C．twice as much as

D．as twice as

选择题

生物的多样性不包括（　　）

A．生物种类的多样性

B．基因的多样性

C．生物栖息地的多样性

D．生态系统的多样性