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【单选题】
HIV通过以下哪些途径导致免疫功能下降
A.
HIV粒子表面的gp120蛋白与正常细胞膜上CD4受体结合,使该细胞被免疫系统误认为病毒感染细胞而遭杀灭
B.
因T细胞CD4受体被gp120封闭,影响了免疫辅助功能
C.
HIV的gp120蛋白可刺激机体产生抗CD4结合部位的特异性抗体,阻断T细胞功能
D.
带有病毒包膜蛋白的细胞可与其他细胞融合形成多核巨细胞而丧失功能
E.
以上都正确
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【简答题】 乙公司某项设备原价为 1600 万元,预计使用寿命为 5 年,预计净残值率为 5% ,要求:分别用年限平均法,双倍余额递减法和年数总和法计算出该设备每年的折旧额。
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【单选题】Corvil launched a moisturiser for men. (successfully)
A.
Corvil launched a moisturiser for men successfully.
B.
Corvil launched a moisturiser for successfully men.
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【单选题】These ___________ men. [     ]
A.
 is
B.
are
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【单选题】Q:What was said about the Argentine election law?
A.
A candidate with over 45 percent of the vote could win the presidency.
B.
A candidate who has 10 more points over the second wins the presidency.
C.
Any candidate who wins the most of the vote could be the winner.
D.
Any candidate who wins at least 40 percent of the vote gets elected.
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【判断题】无源光网络(PON)是指传输设施ODN中不含有源器件。
A.
正确
B.
错误
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【单选题】What is said about the Agricultural Adjustment Act in the passage?
A.
It was supported by Congress rather than the Supreme Court.
B.
It was supported by Congress plus the Supreme Court.
C.
It was based on the principle of indirect interference with supply and demand.
D.
It was based on the principle of soil conservation.
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B.
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【单选题】These ___________ men. [     ]
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【单选题】Q:What was said about the Argentine election law?
A.
A candidate with over 45 percent of the vote could win the presidency.
B.
A candidate who has 10 more points over the second wins the presidency.
C.
Any candidate who wins the most of the vote could be the winner.
D.
Any candidate who wins at least 40 percent of the vote gets elected.
查看完整题目与答案
【判断题】无源光网络(PON)是指传输设施ODN中不含有源器件。
A.
正确
B.
错误
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【单选题】What is said about the Agricultural Adjustment Act in the passage?
A.
It was supported by Congress rather than the Supreme Court.
B.
It was supported by Congress plus the Supreme Court.
C.
It was based on the principle of indirect interference with supply and demand.
D.
It was based on the principle of soil conservation.
查看完整题目与答案