人体内二氧化碳产生的部位是 A．肺泡 B．血液 C．组织液 D．细胞
题型：选择题
问题：
人体内二氧化碳产生的部位是
A．肺泡
B．血液
C．组织液
D．细胞
题型：选择题
An artist went to the beautiful countryside for his holiday and
______ (停留) in a farmer’s home. He often went out to paint with his 1. _____________
paints and brushes. When it got d______, he went back and had a good 2.______________
d______ (吃饭)with the farmer. At the end of his holiday, he wanted to 3. _____________
______ (付) the farmer some money. But the farmer said, “Give 4. _____________
me ______ of your pictures instead of money. Money can be used up, 5. _____________
but your picture will be here forever.” The artist was very p______ 6. _____________
and thanked the farmer ______ saying such kind words about his pictures. 
7. _____________
The farmer ______ (回答), “My son wants to become an artist. When he 8. _____________
comes home from London, I’ll s______ him your picture. He won’t want 9. _____________
to be an artist any more ______ (那时), I think.” 10._____________