更多"How is the image of the north polar"的相关试题:
[单项选择]How is the image of the north polar cap of Mars
A. Vague.
B. Clear.
C. Cannot be seen.
D. Barely visibl
[单项选择]What is the summertime polar cap composed of
A. Dust.
B. Sand.
C. Water ice.
D. Volcanic rocks.
[单项选择]cAMP与CAP结合、CAP介导正性调节发生在
A. 有葡萄糖及cAMP较低时
B. 有葡萄糖及cAMP较高时
C. 没有葡萄糖及cAMP较高时
D. 没有葡萄糖及cAMP较低时
[单项选择]The polar regions are generally covered with ice and snow.
A. areas
B. rocks
C. mountains
D. seas
[单项选择]When were the images of Mars taken
[单项选择]We learn from the passage that after the polar bear gave birth to her babies ______ before the months of night were over.
A. the bear would get out of the snow and get something for the babies to eat
B. the babies would get out of the snow and live on their own
C. the bear would stay in the snow and eat nothing
D. the babies would stay with her and eat nothing
[单项选择]The polar lights, one of the most unusual phenomena in nature, is beautiful to behold.
A. view
B. relate
C. sketch
D. withhold
[单项选择]It can be inferred from the passage that the polar bear population of Hudson Bay ________.
A. is one of several polar bear populations
B. is unfriendly toward humans
C. consumes food voraciously (贪婪地) during the whole year
D. is an endangered species
[单项选择]Polar bears are bowlegged and pigeon-toed, adaptations that enable this
A B
massive animals to maintain their balance as they walk.
C D
[单项选择]Evidence collected by the spacecraft on Mars shows some present volcanic action, though the volcanoes are believed to be dormant if not dead.（ ）
A. deceased
B. departed
C. disappeared
D. extinct
