边际产量[统计] marginal yield

债券收益（Bond yield）

产沙量（sediment yield）

光量子产率（quantum yield）

“Yield point”的汉语意思是（）。

A:溢出点 B:沸点 C:屈服值 D:过度点

We drink more milk, eat more cream, cheese, butter than ever before. To meet and profit by this (61) demand for milk, dairy farmers have increased the (62) of their herds, they have (63) their grasslands more skillfully and have improved the quality of their stock. The average (64) of a cow in 1938 was 560 gallons at each lactation (哺乳期). Today it is well (65) 800 gallons.
The (66) of food given to a milking cow is (67) according to its weight and its yield. Sufficient energy, protein, minerals and vitamins must be fed to (68) the cow in good health and to replace (69) it loses in milk. A (70) supply of drinking water is essential. A cow will drink at (71) ten gallons a day and a (72) milker in hot weather may need as (73) as twenty-five gallons.
Cows are usually milked twice a day, early in the morning (74) in the late afternoon. Machine (75) is almost adopted everywhere now but the cowman still has most important tasks. He will (76) the animals quietly, be keen for any sign of disease, know each animal (77) an individual and record its yield (78) each milking.
Milk gives the farmer a greater income (79) any other product but it demands his time and the investment of a great deal of (80) .

A:outlet B:outcome C:product D:yield

A new technique ______ out, the yield increases by 20%.

A:having working B:having been worked C:at a loss D:for good

We drink more milk, eat more cream, cheese, butter than ever before. To meet and profit by this (61) demand for milk, dairy farmers have increased the (62) of their herds, they have (63) their grasslands more skillfully and have improved the quality of their stock. The average (64) of a cow in 1938 was 560 gallons at each lactation (哺乳期). Today it is well (65) 800 gallons.
The (66) of food given to a milking cow is (67) according to its weight and its yield. Sufficient energy, protein, minerals and vitamins must be fed to (68) the cow in good health and to replace (69) it loses in milk. A (70) supply of drinking water is essential. A cow will drink at (71) ten gallons a day and a (72) milker in hot weather may need as (73) as twenty-five gallons.
Cows are usually milked twice a day, early in the morning (74) in the late afternoon. Machine (75) is almost adopted everywhere now but the cowman still has most important tasks. He will (76) the animals quietly, be keen for any sign of disease, know each animal (77) an individual and record its yield (78) each milking.
Milk gives the farmer a greater income (79) any other product but it demands his time and the investment of a great deal of (80) .

A:outlet B:outcome C:product D:yield

A new technique ______ out, the yield increases by 20%.

A:having working B:having been worked C:at a loss D:for good