Thesuspensionwassubjected_____fourcyclesoffreezingandthawingandwasfurtherdisrupted_____sonication(40s).
举一反三
- The suspension was subjected _____ four cycles of freezing and thawing and was further disrupted _____ sonication (40 s).
- 液体沥青的粘度=40表示（）。 A: 被测沥青的温度60℃，通过10mm孔径满50mL的时间是40s B: 被测沥青的温度40℃，通过10mm孔径满50mL的时间是40s C: 被测沥青的温度60℃，通过40mm孔径满50mL的时间是40s D: 被测沥青的温度10℃，通过40mm孔径满50mL的时间是60s
- 绝大多数真核细胞80S核糖体大小亚基沉降系数分别为 A: 30S和40S B: 80s和70s C: 60s和40s D: 50S和40S
- 真核细胞80S核糖体和原核细胞70S核糖体大小亚基的沉降系数分别是 A: 60S、40S和50S、30S B: 60S、40S和40S、30S C: 50S、40S和50S、30S D: 80S、70S和60S、50S
- 高速公路及一级公路沥青混合料采用的间歇式拌和机每盘生产周期不宜少于:()。 A: 40s B: 45s C: 50 s D: 55 s