在Ⅰ型超敏反应中,细胞内cAMP水平降低能够() A.增强嗜碱性粒细胞的膜稳定性 B

题型:单项选择题 A1型题

问题:

在Ⅰ型超敏反应中,细胞内cAMP水平降低能够()

A.增强嗜碱性粒细胞的膜稳定性

B.增强肥大细胞的膜稳定性

C.引起嗜碱性粒细胞脱颗粒

D.引起T细胞对靶细胞的破坏

E.阻断肥大细胞脱颗粒

考点:公卫执业医师超敏反应超敏反应题库
题型:单项选择题 A1型题

下列事件中是必然事件的是(  )

A.一个直角三角形的两个锐角分别是40°和60°

B.抛掷一枚硬币,落地后正面朝上。

C.当x是非负数时,x≥0

D.长为5cm、5cm、11cm的三条线段能围成一个三角形。

题型:单项选择题 A1型题

我国海南岛农作物的熟制是(  )

A.一年一熟

B.两年三熟

C.一年两熟

D.一年三熟

题型:单项选择题 A1型题

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(1)销售合同


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序号 存在问题 修改

题型:单项选择题 A1型题

利用索道载人,应减慢牵引速度。

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某历史课外兴趣小组要办一期黑板报,有如下的一段宣传材料:这个发明使人类从此开始拥有自己更明亮的“眼睛”,而不再害怕大自然的黑暗。请你给宣传材料中的“发明”添加一个合适的标题()

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