减少水库淤积的主要措施有(),()和(),调水调沙。
参考答案:水土保持;上游拦沙;合理运行
--- Do you know his ________?
--- No. I only know he lives in Hongqi Street. We can call him before we go to his house.
A.address
B.number
C.school
D.birthday
组成细胞的主要有机物是[ ]
A.糖类、蛋白质和脂肪
B.维生素、水和无机盐
C.维生素、膳食纤维和糖类
D.维生素、糖、蛋白质