问题
选择题
His grandmother always _________ him funny stories.[ ]
A. says
B. talks
C. speaks
D. tells
答案
答案：D
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His grandmother always _________ him funny stories.[ ]
A. says
B. talks
C. speaks
D. tells
答案：D
该粒子可用符号 表示，它与镁离子形成化合物的化学式为 。