【简答题】已知下列数据: Mg(s)→Mg(g) S=152.6kJ·mol -1 O 2 (g)→2O(g) D=497.8KJ·mol -1 O(g)→O 2- (g) E=-652.1kJ·mol -1 Mg(g)→Mg 2+ (g) I=2186KJ·mol -1 Mg(s)+ 2(g)→MgO(s) =-600.7kJ·mol -1 试通过Born...
【判断题】Function函数过程名可以返回一个计算结果至主程序。
【单选题】The acid rain destroys the protection on tree leaves, which makes the plants more vulnerable to disease.
【单选题】All of the plants now raised on farms have been developed from the plants wild.
【多选题】平面机构中,两构件通过 [填空(1)] 接触构成的运动副称为低副,通过 [填空(2)] 或 [填空(3)] 接触构成的运动副称为高副。
【单选题】已知298K时,有Zn(s)+1/2O 2 (g)=ZnO(s),ΔrHmθ═-351.5kJ•mol -1 ,Hg(l)+1/2O 2 (g)=HgO(s),ΔrHmθ═-90.8kJ•mol -1 ,则反应Zn(s)+HgO(s)=Hg(l)+ZnO(s)的ΔrHmθ为()。
【单选题】The plants on the ___ shelf were beyond my reach.
【单选题】If all the plants on the earth die, _______ people _________animals will be able to live.