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【简答题】
某鸡场,采用滴鼻点眼法对7日龄鸡接种新城疫F疫苗,以刺激机体免疫器官产出局部黏膜免疫。该免疫器官是( )A.骨髓 B.胸腺 C.法氏囊 D.扁桃体 E.哈德氏腺 某鸡场,3鸡羽毛蓬松,排水样幾便。剖检可见腿肌胸肌出血;此外还发现某免疫器官呈紫葡萄状。该免疫器官是( )A.骨髓 B.胸腺 C.法氏囊 D.扁桃体 E.哈德氏腺 某猪场,2月龄猪高热稽留。剖检病死猪可见回盲瓣口“纽扣状”溃疡。对同群发病猪活体进行病原学检测时应采集的免疫器官是( )A.骨髓 B.胸腺 C.法氏囊 D.扁桃体 E.哈德氏腺
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【单选题】与人交往时,平等待人是促进个人与他人和谐()
A.
保证
B.
前提
C.
条件
D.
要求
【单选题】He appears ______ a long time. He is impatient for my arrival.
A.
to wait
B.
to be waiting
C.
to have waited
D.
to have been waiting
【单选题】George appears______a hard time convincing his employer that he is right over it.
A.
having
B.
to be having
C.
to have
D.
having had
【单选题】中国共产党推进马克思主义中国化过程中产生的第一次历史性飞跃的理论成果是( )。
A.
邓小平理论
B.
毛泽东思想
C.
科学发展观
D.
中国特色社会主义理论体系
【简答题】什么是本征半导体?什么是杂质半导体?以示意图表示它们的能带结构。说明半导体是如何导电的。
【简答题】D The future of agriculture must achieve several goals at the same time. First, it now appears that we will have to double world food production in the next 40 years due to population growth, increasi...
【单选题】----- It appears that your relationship with Mike is not normal, doesn’t it? ----- I thought of him as a trustworthy friend _____, to my shock, he gave me away to the boss.
A.
unless
B.
since
C.
for
D.
until
【单选题】For most people, fat is a burden. It doesn't really matter where it appears, we just don't want it. But it turns out that our bodies also make a unique form. of fat tissue that behaves remarkably unli...
A.
All the people don't like fat at all.
B.
All fat is a kind of tissue storing excess energy.
C.
Brown fat has a unique function that any other fat issue doesn't have.
D.
Brown fat can provide a new way to lose weight.
【单选题】David Beckham suffered a serious injury this weekend ________ playing for AC Milan, and it appears the soccer star will miss the World Cup.
A.
while
B.
if
C.
where
D.
whether
【判断题】P型半导体是本征半导体
A.
正确
B.
错误
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