问题
单项选择题 A1/A2型题
泪液中含量最多的电解质是（）
A.K+
B.Na+
C.Ca2+
D.Mg2+
E.2n2+
答案
参考答案：B
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泪液中含量最多的电解质是（）
A.K+
B.Na+
C.Ca2+
D.Mg2+
E.2n2+
参考答案：B
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| My grandfather and 1_______ go to the park near my house. There 2_______ many people in the park. There are many men and 3_______ talking. There are many children playing and 4_______. Anna and I 5___ ___ up high in a tree. Now we are scared. " Help! " Everyone looks 6_______ me. My grandfather sees Anna and 7_______ in the tree. He runs to the tree and 8_______ Anna and me down. I 9_______ okay, 10_______ Anna hurts her fingers.
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