正确答案: AC

血压正常或稍高 尿量减少

题目：休克代偿期症状是 （ ）

解析：AC

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举一反三的答案和解析：

[单选题]发明专利权的保护期限为

20年，自申请日起算

[单选题]下列种间关系中属于正相互作用的是( )

互利共生

[单选题]Passage FiveThe Northern Pike is a very bad fish. It is a big, hungry fish, and swallows little fish such as trout and perch. Many Northern Pikes live in Lake Davis. They are killing all the smaller fish in the lake. The Northern Pike are a serious threat to the lake because they eat all the smaller fish. Soon, all other species of fish in the lake will be killed off. This is not healthy for the environment.

They think that wells will be polluted.

解析：52．第三段。人们担心湖水里放毒药会殃及人的用水。选项 C是正确的。

[单选题]最容易引起重叠性奔马律的疾病是( )

心功能不全伴心动过速

[单选题]下列属于下呼吸道的是 （ ）

鼻