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【单选题】
PubMed中,要将asthma air都限定在标题中出现,且用AND方式运算,正确的检索式是( )。
A.
asthma AND air[ti]
B.
asthma[ti] AND air
C.
asthma air[ti]
D.
asthma[ti] AND air[ti]
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参考答案:
举一反三
【简答题】比较下列译文。译文a与b哪一种较好?为什么? 轻纺工业产品的花色品种增多,质量继续有所提高。 a. The designs and variety of light industrial and textile products have increased and their quality has continued to improve. b. Light industry and text...
【单选题】若某条无差异曲线是水平直线,这表明该消费者对( )的消费已达饱和(设横轴表示X,纵轴表示 Y)
A.
商品Y
B.
商品X 和商品Y
C.
商品X
D.
商品X 或商品Y
【单选题】若某条无差异曲线是水平直线,这表明该消费者对(    )的消费已达饱和。(设X由横轴度量,Y由纵轴度量)
A.
商品Y;  
B.
商品X;  
C.
商品X和商品Y;  
D.
商品X或商品Y。
【单选题】若某条无差异曲线是水平线,这表明该消费者对 ( ) 的消费已达到饱和
A.
商品 X
B.
商品 Y
C.
商品 X 和商品 Y
D.
不确定
【单选题】若某条无差异曲线是水平直线,这表明该消费者对
A.
商品Y的消费已达饱和
B.
商品X的消费已达饱和
C.
两种商品的消费已达饱和
D.
商品X或商品Y的消费已达饱和
【单选题】若某条无差异曲线是水平直线,这表明该消费者对_____的消费已达到饱和。(设X由横轴度量)
A.
商品Y
B.
商品X
C.
商品X和商品Y
【单选题】轻纺工业产品的花色品种增多,质量继续有所提高。下列选项中哪个译文最佳?
A.
The designs and variety of light industrial and textile products have increased and their quality has continued to improve.
B.
The variety of designs and colors of light textile industrial products increased, and the quality continued to improve.
C.
Light industry and textile products’ variety and design have increased, and the quality continued to improve.
D.
Light industry and textile products are now available in better designs and quality and richer variety.
【单选题】轻纺工业产品的花色品种增多,质量继续有所提高。下列选项中哪个译文最佳?
A.
The designs and variety of light industrial and textile products have increased and their quality has continued to improve.
B.
The variety of designs and colors of light textile industrial products increased, and the quality continued to improve.
C.
Light industry and textile products are now available in better designs and quality and richer variety.
D.
Light industry and textile products’ variety and design have increased, and the quality continued to improve.
【单选题】若某条无差异曲线是水平直线,这表明该消费者对 的消费已达到饱和。 ( 设 X 由横轴度量 )
A.
X 和 Y 都没有
B.
商品 X 和商品 Y
C.
商品 X
D.
商品 Y
【判断题】实验室里一般使用便携式仪表。( )
A.
正确
B.
错误
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