更多"What is the summertime polar cap co"的相关试题:
[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]How is the image of the north polar cap of Mars
A. Vague.
B. Clear.
C. Cannot be seen.
D. Barely visible.
[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]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]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]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]The American population is composed of people of different ______ backgrounds.
A. aesthetic
B. ethnic
C. athletic
D. ethic
[多项选择]CAP的临床诊断依据是
A. 新近出现的咳嗽、咳痰，或原有呼吸道疾病症状加重，并出现脓性痰
B. 肺实变体征和(或)湿性啰音
C. WBC＞10×109/L或＜4×109/L，伴或不伴核左移
D. 胸部X线检查显示片状、斑片状浸润性阴影或间质性改变
[单项选择]The polar region is _______.
A. a good place to land at by airplane
B. a good place to fly over
C. a good place to travel to by land
D. a good place to live at
[单项选择]The polar explorers took every precaution to ________the dangers of their trip.
A. optimize
B. standardize
C. energize
D. minimize
[单项选择]During the years he composed, Charles Ives was isolation from the music world; none of his major works was publicly performed.
