实际造林比计划多百分之几，是把（ ）看作单位“l”，就是求（ ）比（ ）多的面积是（ ）的百分之几。
计划造林；实际造林；计划造林；计划造林
不符合视力下降而眼底正常的眼病有
A．球后视神经炎
B．玻璃体出血
C．癔病
D．视锥细胞变性
E．弱视
Japanese factory workers are guaranteed lifetime jobs, bonuses paid on the basis of productivity and corporate profits, and a wage rate that is not attached to a particular job. Paradoxically, these guarantees do not discourage factory owners from introducing labor-saving machinery. Such innovations are to the factory owners’ advantage despite the fact that the owners must protect the wages of their workers. Which of the following, if true, logically explains why the introduction of labor-saving machinery is advantageous to factory owners ？（）
A．Before a Japanese factory worker is hired, he or she must present a record of his or her previous productivity.
B．Labor-saving machinery increases productivity, thus yielding profits that more than cover the cost of retraining workers for other jobs.
C．The purchase and maintenance of new machinery adds significantly to the final cost of the goods produced.
D．Factory workers demand a change of procedure in the routine tasks they perform.
E．Limited competition exists among Japanese factories for consumer markets.
