Paradox of value 价值悖论

1、The value of the controlled variable,

The value of the controlled variable, which under any fixed set of conditions the automatic controller operates to maintain, is known as （）Aset pointBcontrol pointCdeviationDoffset

2、边际产品价值（Value of marginal product）

边际产品价值（Value of marginal product）

3、The correct pH value of boiler water i

The correct pH value of boiler water is achieved by continuous addition of a suitable （） to the feed.AacidBalkaliCsaltDNone of the above

4、（）is a measure of the market value of

（）is a measure of the market value of all goods and services within the boundaries of a nation.AGNPBGDPCFDIDMNC

5、养分临界值 critical value of nutrient

养分临界值 critical value of nutrient

6、These programs are of immense value to

These programs are of immense value to old people.AnaturalBfatalCtinyDenormous