问题
选择题
Ling Ming and Li Ling ______big eyes.[ ]
A. have both
B. both have
C. all have
D. have all
答案
答案：B
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Ling Ming and Li Ling ______big eyes.[ ]
A. have both
B. both have
C. all have
D. have all
答案：B
+2H+
H2↑+Cl2↑
+2Ba2++5OH
==AlO
+2BaSO4↓+NH3·H2O+2H2O