【单选题】精密水准测量中,主要用什么手段限制i角误差对高差的影响。( )
【简答题】蛋白质的空间结构遭到破坏,其生物活性就会丧失,称为蛋白质的变性,高温、强碱、强酸、重金属等会使蛋白质变性。现利用提供的材料用具,请你设计实验探究乙醇能否使蛋白质变性。 (1)材料用具:质量分数为2%的可溶性淀粉溶液、质量分数为2%的新鲜淀粉酶溶液、蒸馏水、质量浓度为0.1g/mL的NaOH溶液、质量浓度为0.05g/mL的CuSO 4 溶液、无水乙醇、烧杯、试管、量筒、滴管、温度计、酒精灯等。 (...
【简答题】● Accelerated ysis approaches emphasize the construction of (71) to more rapidly identify business and user requirements for a new system. As an accelerated ysis technology, (72) reads the pro...
【单选题】我国居民的膳食中,总热量大约有65%来自糖类,18%来自脂肪,12%来自蛋白质。现有一男生,日供应热量为1. 254×10 4 kJ。他每日中午蛋白质的供应量约为 [ ]
【单选题】Why would a business select an accelerated method of depreciation for tax purposes?
A.
Accelerated depreciation generates higher depreciation expense immediately, and therefore lower tax payments in the early years of the asset’s life.
B.
Accelerated depreciation generates a greater amount of depreciation over the life of the asset than does straight-line depreciation.
C.
Accelerated depreciation is easier to calculate because salvage value is ignored.
D.
Accelerated depreciation generates a lower amount of depreciation over the life of the asset than does straight-line depreciation.
【简答题】急进性高血压(accelerated hypertention)(名词解释)
【简答题】下表是100g某品牌板栗的部分营养成分. 总热量 蛋白质 糖类 油脂 钠 维生素C 1016kJ 5.1g 11.3g ? 4.6mg 3.3mg (1)食物的成分主要有六大类营养素,上表中没有涉及的营养素是______; (2)假设该板栗中的钠元素以氯化钠的形式存在,则100g该板栗中,氯化钠的质量为______ mg(计算最后结果精确到0.1,下同); (3)假设食物的热量是由蛋白质、糖类、油...