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                                                                                                         唐临为官
         唐临为万泉^①丞^②。县有囚十数人，皆因未入赋而系。会暮春时雨，乃耕作佳期。唐临白县令：“囚人亦有妻儿，无稼穑^③何以活人，请出之。”令惧其逸，不许。唐临曰：“明公^④若有所疑，吾自当其罪。”令因请假归乡。临悉召囚令归家耕作，并与之约：农事毕，皆归系所。囚等感恩，至时毕集县狱。临由是知名。

      【注释】①万泉：古县名。②丞：此处指辅助县令的从属官员。③稼穑：耕种与收获。④明公：对县令的尊称。

在平行四边形ABCD中，AC为一条对角线，$\overrightarrow{AB}=(2,4),\overrightarrow{AC}=(1,3),$则$\overrightarrow{AD}=$  (   )

碱式碳酸铜和氯气都是用途广泛的化工原料。

    It was a Monday morning. When a teacher walked into the1, he heard a low voice: “Here is the teacher. I am 2this boring fellow(烦人的家伙) is going to talk about putting in commas(逗号).” It was a boy's3. His name was Bill. He was talking4the boy next to him. The teacher didn't get angry. He said5about it, then he really began to talk about putting in commas, and then he wrote6the sentence: “Bill says the teacher is a boring fellow.” The class7and Bill's face8red. “Now,” said the teacher, “I'll 9you how important commas are.”

    He put two commas in the sentence, and now read, “10is a boring fellow.”