假定英语课上老师要求同桌之间交换修改作文,请你修改同桌写的以下作文,文中共有10处语言错误,每句中最多有两处,错误涉及一个单词的增加、删除或修改。 增加:在缺词处加一个漏字符号(∧),并在此符号下面写出该加的词。 删除:把多余的词用斜线(﹨)划掉。 修改:在错的词下画一横线,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。

Boys and girls,

    May I have your attention, please?

    There will a lecture in our library, at 4:00 on Wednesday afternoon. We are very honour to have invited Professor Tang Wenfang, who has been studied cultural differences in Tsinghua University for many years, in talk about the differences between American and Chinese cultures, that may be quite an interested topic. After a lecture, you are welcome to share your experience in China with everyone else present. Since you have stayed in China for half a year, because you have anything that what puzzles you, it would be great to talk with Mr.Tang. He will be glad to communicate with you. Please be present on time.

    That's all. Thank you.

下列计算正确的是（　　）

安慰剂效应指病人虽然获得无效的治疗，但却“预料”或“相信”治疗有效，而让病患症状得到舒缓的现象，这个现象的存在，科学家至今仍未能完全破解。如早在抗菌素发明以前，医生们就常常给病人服用一些明知无用的粉末，有的甚至还平安地渡过了诸如鼠疫、猩红热等“鬼门关”。这一事例告诉我们（    ）

①客观性作为主观性的累积并不以人的意志为转移

②事物之间存在的联系是以具体条件为基本前提的

③发挥主体因素的调适功能是疾病治疗的重要方面

④物质世界总会存在人们无法认知的领域与现象

某同学用伏安法测量导体的电阻，现有量程为3 V、内阻约为3 kΩ的电压表和量程为0.6 A、内阻约为0.1 Ω的电流表。采用分压电路接线，图1是实物的部分连线图，待测电阻为图2中的R₁，其阻值约为5 Ω。