仅仅根据化学方程式 Na₂CO₃+2HCl═2NaCl+CO₂↑+H₂O，不能获得的信息是（　　）

在“制作洋葱鳞片叶表皮细胞的临时装片”实验中，操作不正确的是（    ）

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    On Sundays, Li Lei gets up at six thirty. He has 1 at eight. Then he helps his mother 2 the housework（家务劳动）. At ten o'clock he leaves 3 and goes shopping 4 bike. At about eleven o'clock he comes 5 home.

    He likes 6 very much. He helps his mother with the cooking. They 7 lunch at twelve.

    In the afternoon he often 8 games with his friends. They have 9 at six thirty. In the evening he does his homework. Sometimes, he 10 TV. He goes to bed at nine.

依次填入下面一段文字横线处的语句，衔接最恰当的一组是（   ）
上海文明的另一种心理品性，是发端于国际交往历史的开放型文化追求。             
①他们从来在内心没有鄙视过外国人
②毫无疑问，这与这座城市的历史密切相关
③因此也不会害怕外国人，或表示超乎常态的恭敬
④他们在总体上有点崇洋，但在气质上却不大会媚外
⑤相比之下，在全国范围内，上海人面对国际社会的心理状态比较平衡