钢厂的最大负荷利用小时数一般（）农村灌溉最大负荷利用小时数。
A.等于
B.大于
C.小于
D.大于等于
参考答案：B
根据句意及首字母（汉语）的提示，补全单词。
1. (蝴蝶)can fly 10 kilometers per hour.
2. He was brought up in very difficult_____(情形).
3. Please come here as soon as p_____.
4. Heilongjiang is the n_____province of China.
5. This is a bag_____(装满)with sand.
确定投资方案可行的必要条件是（）。
A.投资利润率大于0
B.净现值大于0
C.内部报酬率大于0
D.投资利润率大于必要报酬率
