【单选题】运行下列程序的结果是: public class Test{ public static void main(String args[]){ Test s = new Test(); } publuc Test(){ String s1 = "Hello"; String s2 = new String("Hello"); if(s1==s2){ System.out.println("We ha...
【判断题】苯妥英钠为抗癫痫药,临床上也可用于室性心率失常的治疗。()
【简答题】阅读理解。 We have a PE (体育) class this morning. It is very interesting. First, we do some warm-up exercises (热身运动). It's relaxing. Then, our PE teacher teaches us to play tennis. We watch him very careful...
【简答题】三聚氰胺(化学式:C 3 H 6 N 6 ),(汉语读音:sān jù qíng àn),俗称密胺、蛋白精,是一种三嗪类含氮杂环有机化合物,被用作化工原料.它是白色单斜晶体,几乎无味,微溶于水(3.1g/L常温),可溶于甲醇、甲醛、乙酸、热乙二醇、甘油、吡啶等,具毒性,不可用于食品加工或食品添加物.下列叙述中不正确的是( ) A.三聚氰胺的相对分子质量是126 B.一个“三聚氰胺”分子中含有3种...
【单选题】三聚氰胺(化学式:C 3 H 6 N 6 ),(汉语读音:sān jù qíng àn),俗称密胺、蛋白精,是一种三嗪类含氮杂环有机化合物,被用作化工原料。它是白色单斜晶体,几乎无味,微溶于水(3.1g/L常温),可溶于甲醇、甲醛、乙酸、热乙二醇、甘油、吡啶等,具毒性,不可用于食品加工或食品添加物。下列叙述中不正确的是 [ ]
B.
一个“三聚氰胺”分子中含有3种元素的15个原子
C.
三聚氰胺分子中C、H、O三种元素的质量比为3:6:6
【简答题】We have started a (运动,竞争) for better nursery and school services.
【单选题】We have a _______ (运动会) this term.