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【单选题】
设随机变量 服从参数为 的泊松分布( ),且 ,则 =( )A.
1
B.
2
C.
3
D.
4
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反馈参考答案：
举一反三
【单选题】How does the professor explain the term solar system?
A.
He identifies the key features of a solar system.
B.
He refers to the glossary in the textbook.
C.
He gives several examples of solar systems.
D.
He contrasts a solar system with a galaxy.
【单选题】Which of the following is the solar term in Winter?
A.
Grain Rain （谷雨）
B.
Awakening of Insects （惊蛰）
C.
Winter Solstice （冬至）
D.
Grain in Ear （芒种）
【单选题】抗利尿激素和醛固酮能够共同作用于肾脏，调节水和钠等电解质的吸收和排泄，下列描述中正确的是
A.
抗利尿激素分泌增多促进远曲肾小管对Na+的再吸收和K+、H+的排泄
B.
醛固酮分泌减少使远曲肾小管和集合管上皮细胞再吸收水分增加
C.
机体对水钠改变的一般反应规律是首先恢复和维持血容量，尔后恢复和维持正常渗透压
D.
口渴反应产生的主要原因是细胞外液渗透压升高
E.
体液的正常渗透压主要通过肾素-醛固酮系统来维持
【单选题】Which is the third solar term in summer?
A.
Start of Summer.
B.
Grain Buds.
C.
Grain in Beard.
D.
Summer Solstice.
【单选题】Which of the following is the solar term in Winter?
A.
Grain Rain
B.
Awakening of Insects
C.
Winter Solstice
D.
Grain in Ear
【单选题】抗利尿激素和醛固酮能够共同作用于肾脏，调节水和钠等电解质的吸收和排泄，下列描述中正确的是
A.
抗利尿激素分泌增多促进远曲肾小管对Na+的再吸收和K+、H+的排泄
B.
醛固酮分泌减少使远曲肾小管和集合管上皮细胞再吸收水分增加
C.
机体对水钠改变的一般反应规律是首先恢复和维持血容量，尔后恢复和维持正常渗透压
D.
口渴反应产生的主要原因是细胞外液渗透压升高
E.
体液的正常渗透压主要通过肾素一醛固酮系统来维持
【单选题】On which solar term was the Jitian Ritual held in the Ming and Qing Dynasty?
A.
Beginning of Spring.
B.
Awakening of Insects.
C.
Spring Equinox.
D.
Pure Brightness.
【单选题】On which solar term was the Jitian Ritual held in the Ming and Qing dynasties?
A.
Beginning of Spring.
B.
Awakening of Insects.
C.
Spring Equinox.
D.
Pure Brightness.
【单选题】What is the second solar term in summer?
A.
Grain Rain.
B.
the Beginning of Summer.
C.
Grain Buds.
D.
White Dew.
【单选题】Which is the third solar term in spring?
A.
Start of Spring.
B.
Grain Rain.
C.
Awakening of Insects.
D.
Pure Brightness.
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