可通过观察水上部分的明显变化而初步分析判断水下是否有坍塌现象。
参考答案：对
阅读短文，选择正确答案。
Lucy and Lily are twins. They live in London. They are high school students. They are in the same school.
Their father is working in China now. They often write to their father. And their father often writes back to
them. He says the Chinese people are very friendly and the Chinese food is very nice. He likes China very
much. Lucy and Lily want to come to China, too.
1. Lucy and Lily live in . [ ]
A. China
B. England
C. America
2. They study in a school. [ ]
A. high
B. old
C. new
3. Their father is in now.[ ]
A. America
B. China
C. England
4. Their father often to them and tells them something about China.[ ]
A. speaks
B. writes
C. tells
5. Their father likes the Chinese people and the Chinese .[ ]
A. food
B. street
C. river
下图是胰腺组织局部结构模式图，请据图回答。
(1)A液为_______，B液为________，C液为________，三者共同构成了胰腺组织细胞生活的液体环境，这个液体环境称为____________。
(2)CO2不会从毛细血管进入胰腺组织细胞的原因是前者的CO2分压_______(大于/小于)后者。
(3)胰腺组织细胞可分泌胰岛素和消化酶(胰蛋白酶、胰脂肪酶等)，其中_______可进入血液，参与物质代谢的调节。
