单项选择题

The word "nomadic" in the sentence "How is this affected by whether a bird is nomadic." can best probably mean ______.

A．living in the north
B．immigrant according to seasons
C．'immigrant from place to place irregularly
D．feather changing according to seasons
<上一题 目录 下一题>
热门 试题

单项选择题
The loss of one or two northern fight whales every year is considered an unaeeeptable loss because they ______.
A．are the only Whales that can sing songs
B．are the only whales capable of masking the clamour of ocean noise
C．provide clues to scientists to study sea currents and waves
D．are on the very verge of distinction
单项选择题
The ambient noise imaging is able to locate the whales even when they are silent because ______.
A．the whales may create detectable "sound shadows"
B．the new sonar equipment is more powerful
C．the new sonar technology can see through sea water
D．the existence of whales may reinforce reflection signals
相关试题