【单选题】以下哪种化合物不是常用的防止褐变的抗氧化剂 ( )
【单选题】平层感应器和隔磁板{遮光板}安装应平正、垂直。遮光板插入感应器时两侧间隙应尽量一致,其最大偏差不应大于( )mm。
【简答题】What credit risk assessment is involved in sole proprietorship and partnership company loan
【单选题】土壤动物能够促进农田生态系统物质循环并改良土壤结构,其类群组成和数量是评价农田生态环境的重要指标。下表是某农田使用两种肥料后4类土壤动物物种数和密度(个/m 2 )调查数据。根据表中数据可以得到正确结论是 [ ]
A.
化肥田土壤动物的物种多样性减少,营养结构简单
C.
化肥田土壤动物个体总数减少,但是生物多样性提高
【多选题】Health risk assessment of novel nanomaterials includes:
C.
small animal (in vivo, e.g. fish, mice or rats) studies
D.
computational studies, systems biology approaches as well as high-throughput screening platforms
【简答题】假设有一幅100像素×100像素、8个灰度级的图像,各灰度级概率分布如下表所示,试写出将该图像直方图均衡化的具体过程和最后映射后的灰度级
【单选题】In risk assessment, at least four basic elements should be considered( )
A.
fatigue, disease, drugs, alcohol
B.
route, aircraft, weather, traffic
C.
pilots, aircraft, environment, available time