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【单选题】
(选做)吗啡激动中脑盖前核的阿片受体,引起()A.
缩瞳作用
B.
欣快作用
C.
镇痛作用
D.
镇咳作用
E.
胃肠活动改变
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【单选题】In order not to be disturbed ,I spent three days in my study.
A.
locking
B.
locked
C.
to lock
D.
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【简答题】For years I wanted a f lower garden. I spent hours and days thinking of different things I could plant that would look nice together. But then we had Matthew. And Marvin. And the twins, Alisa and Alan...
【单选题】下列关于政府采购合同的说法中,错误的是( )。
A.
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B.
政府采购应当采用书面形式
C.
政府采购合同中无论是否包括必备条款的内容，合同都是有效的
D.
政府采购合同的双方当事人不得擅自变更、中止或者终止合同
【单选题】In order not to be disturbed ,I spent three days in my study.
A.
locking
B.
locked
C.
to lock
D.
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