对于交通、教育等支出项目,在衡量和提高财政支出效益时应采取的方法是( )。
A.“成本—效益”分析法
B.投入产出评价法
C.最低费用选择法
D.公共劳务收费法
参考答案:D
句型转换。
1. Nothing can live without air. (变为同义句)
Nothing can live if __________ is _________ air.
2. It's about 20 minutes' walk to the farthest restaurant. (就划线部分提问)
_________ _________ is it to the farthest restaurant?
3. The little girl is too young to stay at home by herself. (变为同义句)
The little girl ________ old ________ to stay at home _______.
The little girl is ________ young ________ she can't stay at home by herself.
4. I think math is the most difficult subject of all. (变为同义句)
I think math is ________ ________ than the ________ subjects.
5. English is more interesting than history. (变为同义句)
History is _________ interesting ________ English.
History isn't so _________ as English.
培养基灭菌是否彻底直接关系到生产过程的成败,灭菌失败主要不良后果包括()。
A、杂菌污染造成生产能力的下降
B、杂菌产物使目的产物的提取和分离变得非常困难
C、菌种发生遗传变异
D、改变反应介质的pH值,使生物反应发生异常变化
E、杂菌可能会分解产物,使生产过程失败