消化液的作用,不正确的是()
A.稀释食物
B.水解食物,使之便于吸收
C.保护消化道黏膜
D.保证消化酶的活性
E.所有消化液的成分及性质相同
参考答案:E
The parents had to sell their car for money ______ they wanted to save their child's life. [ ]
A. if
B. whether
C. because
D. so
测量成果资料的主要形式包括()、电子文档等形式。()
A.纸制
B.图纸
C.表格
D.word