四氧化物

Since gas sensors based on metal oxide semiconductor had been studied in 1962, researchers have basically resolved the problems of low sensitivity and poor selectivity of gas sensors. Recently, gas sensors have been widely used to detect or control inflammable and toxic gases.

经过四十多年的研究发展，传感器工作者已基本解决了金属氧化物半导体气体传感器的灵敏度和选择性问题，使之在可燃气体、有毒有害气体的检测和控制方面取得了广泛地应用。

Methods the models of epilepsy were made by intraperitoneal injection of pentylenetetrazol and the contents of no,mda and sod of all the epileptic hippocampus were assayed and dealt with all data by statistical analysis.

健康sd大鼠38只，分5组，采用戊四氮腹腔注射制作癫痫模型，测定各组大鼠海马一氧化氮、丙二醛的含量和超氧化物岐化酶的活性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。