与-457°角的终边相同的角的集合是( ) A.{α|α=263°+k×360°,

题型:选择题

问题:

与-457°角的终边相同的角的集合是(  )
A.{α|α=263°+k×360°,k∈Z}B.{α|α=-263°+k×360°,k∈Z}
C.{α|α=457°+k×360°,k∈Z}D.{α|α=93°+k×360°,k∈Z}
考点:终边相同的角
题型:选择题

“一拜天地,二拜高堂”,是我国旧式婚礼中的惯常礼仪。这种“敬天法祖”民俗出现的制度源头可追溯到                                        

A.世袭制度

B.等级制度

C.宗法制度

D.分封制度

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填空,选择适当的单词用其正确的形式填空。 (15)
 words  , hear  , save  , ear  , suddenly , they ,try  ,  trouble ,  sure , hard  ,
Some frogs were playing in the forests .   __小题1:__, two of them fell into a hole . The other frogs ___小题2:__ to help them . When they saw how deep the hole was , they cried to the two frogs that they couldn’t _小题3:__them at all . The two frogs didn’t seem to ___小题4:___ them . They still tried __小题5:___ best to jump up . The other frogs kept saying they  were__小题6:___ to died .Finally , one of the two frogs believe the other frogs ’__小题7:_, Then he fell down and died .
The other frog , however , didn’t care . He jumped as __小题8:____ as he could . At last , he jumped out . The other frog asked , Didn’t you hear us ? He said there was something wrong with his ___小题9:____, He thought they were cheering him on all the time .
When people are in __小题10:____, an encouraging word can help them out while a discouraging one can kill them .
题型:选择题

脊髓灰质炎疫苗初种年龄

A.生后2~3天至2个月

B.2个月

C.8个月

D.3个月以上

E.1岁以上

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根据民主集中制,在不同的主客观条件下,把不同程度的领导权力下放给下级主管人员或其他人员,并对其进行指导和监督。这是()艺术的具体体现。

A、用人

B、决策

C、授权

D、激励

题型:选择题

什么样的人不适合做手术?

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