科技从不同侧面影响着人们的生产生活，根据下列材料回答问题：

材料一：云南网3月1日电：突发消息：刚才一伙男子持械冲进昆明火车站广场、售票厅，见人就砍，现场有人员伤亡。10多辆警车已赶赴现场紧急处置。这伙歹徒手持刀具、统一着装，现场已有多人受伤。大批民警赶到现场后，火车站内传来枪声，目前，永平路至火车站实行紧急交通管制。

材料二：2014年上半年先后发生的两次重大交通事故。

材料三：中国国家互联网应急中心的最新数据显示，2014年3月19日至5月18日，2077个位于美国的木马或僵尸网络控制服务器，直接控制了我国境内约118万台电脑主机。

请回答：

某一电场的电场线分布如图所示，以下说法正确的是（   ）

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

Dear Tom，

    How time flies! You ____ (study) in Beijing for nearly a month, during which you must have achieved a lot. Well, how's everything going? It is reported that the weather there is very hot and dry these days, which is very different from____ of your country. Have you adapted to it? In addition, you once complained that the food ____ (serve) there was not ____ your taste. I hope that should have been improved.

    I am glad to tell you that I will go to Beijing to take part in an English speech contest in July, ____ is not only an honor, but also a great opportunity for me to improve ____. And now I try my best to make ____ (prepare) for it. ____, I have some trouble in collecting the materials relevant and using the language. I will appreciate ____ if you give me a hand to solve the problems.

    After the contest, I am to drop ____ at your school to visit you. Please wait for my phone.

Li Hua