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【单选题】变应性鼻炎发作时，喷嚏连续发作的原因是
A.
鼻腔阻力血管收缩，鼻涕增多
B.
鼻腔容量血管扩张，黏膜水肿
C.
毛细血管通透性增高
D.
感觉神经敏感性增强
E.
副交感神经活性增高，腺体增生
【单选题】Face Masks May not Protect from Super-flu If a super-flu strikes, face masks may not protect you. Whether widespread use of masks will help, or harm, during the next worldwide flu outbreak is a questi...
A.
Reasons for Excluding Masks from the Self-protection List
B.
Effort to Stop Flu Spreading
C.
When to Use Face Masks
D.
Guidelines on Mask Use
E.
Warnings from the CDC
F.
Danger of Infection through Germy Hands and Masks Paragraph 2 ______
相关题目：
【单选题】变应性鼻炎发作时，喷嚏连续发作的原因是
A.
鼻腔阻力血管收缩，鼻涕增多
B.
鼻腔容量血管扩张，黏膜水肿
C.
毛细血管通透性增高
D.
感觉神经敏感性增强
E.
副交感神经活性增高，腺体增生
【单选题】Face Masks May not Protect from Super-flu If a super-flu strikes, face masks may not protect you. Whether widespread use of masks will help, or harm, during the next worldwide flu outbreak is a questi...
A.
Reasons for Excluding Masks from the Self-protection List
B.
Effort to Stop Flu Spreading
C.
When to Use Face Masks
D.
Guidelines on Mask Use
E.
Warnings from the CDC
F.
Danger of Infection through Germy Hands and Masks Paragraph 2 ______
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