完成反应方程式: (1) Al(OH) 3 + NaOH —— (2) Na 2 B 4 O 7 + H 2 SO 4 + H 2 O —— (3) Al + NaOH + H 2 O —— (4) Be + NaOH + H 2 O —— (5) B 2 H 6 + CH 3 OH —— (6) B + NaOH + KNO 3 熔融 (7) B(OH) 3 + H 2 O ——
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