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【判断题】
( )1.网络促销是网络营销的常用手段,在网络虚拟社会营销中起着重要的作用。 A. √ B. ×A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】Which of the following statements regarding the Drosophila Bar phenotype is NOT true?
A.
Unequal crossing over may give a rise to the duplication of the Bar region.
B.
The trait is inherited as a complete dominant where both homozygous and heterozygous show similar phenotype.
C.
The more Bar segment copy the fly has, the more reduced the facets in the eyes get.
D.
The Bar phenotype reflects the genetic phenomenon called gene dosage effect.
E.
The balance of gene product is critical to cell function and normal development.