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【多选题】
自然疫源性疾病的特点有A.
自然界长期有病原体存在
B.
节肢动物为传播媒介
C.
发病有地方性
D.
发病有季节性
E.
局部地区突发性烈性传染病
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【单选题】The only thing that spoilt my joy a little was that I was so______to have anything typical of my country to wear at the dinner.
A.
unfortunate as
B.
unfortunate as not
C.
unfortunate that
D.
unfortunately that
【单选题】Little that the course of his life was about to change then. [ ]
A.
he is known
B.
did he know
C.
does he know
D.
is he known
【简答题】The little snow that falls in Antarctic never melts.
【简答题】下列关于胃酸分泌调节的叙述,正确的是( )。
【单选题】The farmers and bad debts have become synonymous. Little wonder then that a bank that carries a third of all loans to America's farmers is in trouble. But when that bank's total debt is $ 60 billion, ...
A.
Agriculture history of America.
B.
Conflicts between farmers and creditors.
C.
Means of expanding farming.
D.
Help for the Farm Credit System.
【简答题】中国古代学校分为官办和民办两类,其中民办的叫()。
【单选题】下列关于胃酸分泌调节的叙述,正确的是( )。
A.
头期为纯神经调节
B.
胃期由神经、体液因素共同参与
C.
胃期约占分泌总量的30%
D.
肠期为纯体液调节
E.
三个时期的分泌，按顺序发生，互不重叠
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