遗传标记（genetic marker）

形态标记（morphological marker）

分子标记（molecular marker）

分子标记辅助选择（marker assistance slection，MAS）

What is the most important marker-related factor to the transport cost?（）

A:Location of market B:Government regulation C:Competition D:Seasonality of products flow

Marker天线与哪个组件相连（）.

A:VOR 1 B:VOR 2 C:VOR 1和VOR 2 D:指点信标机1和2

Which of the following can be an appropriate heading for the passage______

A:Different Patterns of Speech in Different Situations B:Response Matching and Speech Divergence C:Social Integration or Imitation D:Ways of Speaking Present and Past

What is ship's heading? ship's heading is the direction_______.

A:the vessel is pointing. B:the vessel is traveling relative to land C:the vessel is traveling relative toground D:the vessel is drifting

"Afterglow of targets will______．

A:have ships heading marker fixed at 000 B:Bcause the fixed targets to remain fixed C:inhibit the detection of small target D:make the identification of smaller targets difficult"