公元前449年，罗马共和国元老院成立立法委员会，颁布了《十二铜表法》，它属于（    ）

额定电压是指用电器在____时的电压，额定功率是指用电器在____时的电功率．

假定你是李华，你的美国朋友Lucy在当地一所孔子学院(Confucius Institute)学习，你刚获悉她在学校举办的中文书法比赛中获一等奖。请你用英语给她写一封电子邮件表示祝贺，并邀请她暑假来参加“游北京，登长城”活动。

注意：1）词数100左右；2）可以适当增加细节，以使行文连贯。

Dear Lucy,

Yours truly,

Li Hua

阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项。

B

    A group of children meet in the library each week during lunchtime. They are famous as the Miss Margaret Fan Club. Every Thursday, the twelve members of the Miss Margaret Fan Club make their way to the study center in the back of the library.
    The first Thursday they met, Miss Margaret greeted them with a little talk.
    "Welcome to the first meeting of the writing club!" she said. "During the school year, we will meet here to work on story writing. At the end of the year, I will put all of your stories together in a book."
    Miss Margaret gave a pencil and two pieces of paper to each student.
    "Now, your first homework is to think of a character. Now, try to think about an interesting person. When you think of this person, write down all the details(细节)about him or her in your head. "

下列关于工业用赤铁矿炼铁的叙述中错误的（　　）