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【单选题】
a =(cos2 5 0 ，sin2 5 0 )， b =(sin2 0 0 ，cos2 0 0 )， u = a +t b ，t∈R ，则| u |的最小值是（ ）A.
2
B.
2 2
C.
1
D.
1 2
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【简答题】简述家禽的饲养方式
【简答题】The inner flesh is white, very juicy, and tastes wonderfully sweet and cool.
【单选题】He would always ignore the fact of ______ such a contradiction in his inner thought.
A.
there to be
B.
there being
C.
it being
D.
tbere having been
【简答题】下列哪个药物不用炒焦法炮制（ ）
【单选题】It suggests that in the inner battle between the self and the () toward others he will lean toward self.
A.
mockery
B.
obligation
C.
restrained
D.
distressed
【单选题】People in the village believed that he has died ____ they saw him in the flesh on the street.
A.
until
B.
when
C.
with
D.
as
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