下列句子没有语病的一项是（    ）

“对中国国民党来讲，南京是一个具有历史连接、感情连接的地方……”下列有关孙中山先生与南京关系的叙述，正确的是

①1912在南京宣誓就任临时大总统，宣告中华民国成立

②在南京颁布《中华民国临时约法》

③在南京国民党“一大”上把旧三民主义发展为新三民主义

④南京是孙中山先生的陵寝所在地

若样本数据 $x_1,x_2,\cdots ,x_{10}$ 的标准差为 $8$ ，则数据 $2x_1-1,2x_2-1,\cdots ,2x_{10}-1$ 的标准差为(   )

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及二个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1）每处错误及其修改均仅限一词；
      2）只允许修改10处，多者（从第11处起）不计分。
    I will share with you true story that happened a couple of day ago. One of my classmates bought a bag of snacks from a food store. A few classmates were then inviting to enjoy the snacks. Unluckily, all of us got poisoned and had stomachaches with their faces pale. They were quickly sent to a nearby hospital. Doctors examined them but gave them some medicine. They were out of danger soon before taking the medicine. This accident makes us to realize the seriousness of the food safe problem. Therefore, I strong suggest that the whole society pays more attention to it.

小明去超市，走到电梯前发现电梯运动较慢，当他站在电梯上时又快了起来．小明根据所学的知识，画出如图所示的电路（R是一个压敏电阻）．小明分析：当人站在电梯上，压敏电阻的阻值减小，则电磁铁的磁性变____ ，衔铁与触点　____ 　（填“1”或“2”）接触．