人在患重感冒时,鼻腔阻塞,往往要用嘴呼吸。在这种情况下,早上醒来时会觉得嗓子非常

题型:选择题

问题:

人在患重感冒时,鼻腔阻塞,往往要用嘴呼吸。在这种情况下,早上醒来时会觉得嗓子非常干,这说明了[ ]

A.空气中的水分全部被口腔吸收了            

B.感冒病毒使空气中的水分减少了

C.鼻腔中有温暖湿润、空气的作用              

D.口腔有温暖、湿润空气的作用

考点:呼吸系统的组成和功能
题型:选择题

沙门菌属不具有的抗原为 ()

A.O抗原

B.H抗原

C.K抗原

D.Vi抗原

E.M抗原

题型:选择题

下列选项中,不属于信息传输安全过程的安全威胁是( )。

A.拒收信息
B.窃听信息
C.篡改信息
D.截获信息

题型:选择题

Geography is the study of the relationship between people and the land. Geographers compare and contrast various places on the earth. But they also (51) beyond the individual places and consider the earth as a whole. The English word geography means "to describe the earth. " (52) geography books focus on a small area like a town or city. Others deal with a state, a region, a nation, or an (53) continent. Many geography books deal with the whole earth. Another (54) to divide the study of geography is to distinguish between physical geography and cultural geography. The former focuses on the natural world; the (55) starts with human beings and studies how human beings and their environment act (56) each other. But when geography is considered as a single subject, (57) branch can neglect the other. A geographer might be described as one who observes, records, and explains the (58) between places. If all places (59) alike, there would be little need for geographers. We know, however, that no two places are exactly the same. Geography, (60) is a point of view, a special way of looking at place.

60().

A.still 

B.then 

C.nevertheless 

D.moreover

题型:选择题

疏表润燥法的作用(),代表方剂是()。

题型:选择题

EPFC单板提供4路EPON光接口支持IGMP SNOOPINg,每个PON支持()个组播组。

更多题库