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【单选题】
–Good morning, Miss Gao! -_________.A.
Good morning, Nick
B.
Good afternoon, Nick
C.
Good night, Nick
D.
Good evening, Nick
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【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...
【简答题】已知△ABC ∽ △A 1 B 1 C 1 ，AB：A 1 B 1 =3：4，则S △ABC 与 S △ A 1 B 1 C 1 之比为______．
【单选题】All of the plants nowraised on farms have been developed from plants once grew wild.
A.
B.
C.
D
【单选题】All of the plants now raised on farms have been developed from the plants wild.
A.
once they grew
B.
they grew once
C.
that once grew
D.
once grew
【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（）。
A.
442.3kJ•mol -1
B.
260.7kJ•mol -1
C.
–442.3kJ•mol -1
D.
-260.7kJ•mol -1
【单选题】All of the plants now raised on farms have been developed from the plants _____ in the wild.
A.
once they grew
B.
they grew once
C.
that once grew
D.
once grew
【单选题】已知 C(s)+1/2O 2 (g) → CO(g) 的△ r H m =-110.5kJ·mol -1 , C(s)+O 2 (g) → CO 2 (g) 的△ r H m =-393.5kJ·mol -1 ,则 CO(s)+1/2O 2 (g) → CO 2 (g) 的△ r H m 为 ( )
A.
-283.0kJ·mol -1
B.
283.0kJ·mol -1
C.
-110.5kJ·mol -1
D.
-504.0kJ·mol -1
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【单选题】All of the plants nowraised on farms have been developed from plants once grew wild.
A.
B.
C.
D
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