Which one of these nouns is countable?
A. travel
B. book
C. research
D. weather
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Which statement uses an uncountable noun?
A. Would you like a coffee?
B. Would you like the coffee?
C. Would you like my coffee?
D. Would you like some coffee?
Look at these sentences and decide which one correctly uses an uncountable noun?
A. I'm looking for some good accommodations for my holiday.
B. Please help me with my homeworks.
C. He sat down and drank a water.
D. None of the above
Complete this sentence using the correct use of an uncountable noun. "Can I give you…."
A. an advice
B. some advices
C. a piece of advice
D. all of the above
体循环（）
A. 起自左心室
B. 将血液射入肺动脉干
C. 肺静脉内含静脉血
D. 与肺泡进行交换
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