题目

阅读下面材料,在空白处填入1个适当的单词或括号内单词的正确形式。Doyou really want to be happy? Everyone says yes, but do you know the approach happiness is giving to others? Some of us mayfeel that if we give too much, our generosity will (take) advantage of by others. However, peoplewho see your good intentions as weakness are in the (minor).DannyThomas said, Success in life has to do with what you gain in life or accomplishfor yourself. It's what you do for others. So why not start with you andme right now?Youcan donate anything without (seek) reward. This 实验室现有3种指示剂,其pH变色范围如下:甲基橙:3.1~4.4  石蕊:5.0~8.0  酚酞:8.2~10.0用0.1000 mol/L NaOH溶液滴定未知浓度的CH3COOH溶液,反应恰好完全时,下列叙述中正确定是                                                (    ) A.溶液呈中性,可选用石蕊或酚酞作指示剂       B.溶液呈中性,必选用石蕊作指示剂 C.溶液呈碱性,可选用甲基橙或酚酞作指示剂     D.溶液呈碱性,可选用酚酞作指示剂
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