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【单选题】
下列为乙类传染病,但需要按甲类传染病管理的是A.
人感染高致病性禽流感
B.
艾滋病
C.
登革热
D.
布鲁氏菌病
E.
流行性出血热
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【单选题】This store has T-shirts in all colors __________ good prices, You can buy one __________ only 20 yuan. [ ]
A.
at, for
B.
at, in
C.
with, for
【单选题】The last paragraph of this passage implies that
A.
only at flea market can you buy nothing
B.
you can always find the very thing you've been looking for
C.
you may find the items that you've used at the flea market
D.
both selling and buying at flea market are pleasant
【简答题】乙醚常温下为 的液体 , 具有特殊的气味 , 易挥发 , 是 有机溶剂 , 在外科手术中常用作 剂。乙醚在使用前 , 应检验是否有 存在 , 若有应把它除去。
【简答题】WASHINGTON — Money can buy happiness, but only if you spend it on someone else, according to researchers. Spending as little as $5 a day on someone else could significantly boost happiness, the team a...
【简答题】统计认识的过程是：______。
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