材料一：新中国成立初期，我国的工业基础，特别是重工业基础非常薄弱……这种落后的经济状况只能靠优先发展重工业才能改变，只有钢铁等基础工业发展了，机器制造业的原料增多了，轻工业的装备才能保证……同时，当时的国际环境也急需我们尽快建立强大的军事工业，以增强国防力量。

材料二：为了有计划地进行社会主义建设，我国政府编制了发展国民经济的第一个五年计划。它的基本任务是：集中主要力量发展重工业，建立国家工业化和国防现代化的初步基础；相应地发展交通运输业、轻工业、农业和商业；相应地培养建设人才。

材料三：1958年8月17日，中共中央在北戴河召开政治局扩大会议，通过《全党全民为生产1070万吨钢而奋斗》的决议，从此掀起轰轰烈烈的全民大炼钢铁运动。全国几千万人上阵，大搞小高炉、土法炼钢铁、群众运动。1958年12月19日宣布，提前12天完成钢产量翻番任务，钢产量为1108万吨，生铁产量为1369万吨。实际上合格的钢只有800万吨，所炼300多万吨土钢、416万吨土铁根本不能用。估计炼钢铁在全国约损失200亿元。

材料四：十一届三中全会以来，中国工业实力显著增强，到二十一世纪初，我国的钢、煤、水泥、电视机等工业品产值已居世界第一位。同时，逐步形成了以能源、机械、化工、航空航天、纺织服装、家用电器等为主体的门类齐全、独立完整的现代化工业体系。

学校有一个长方形的苗圃，面积为560平方米，已知它的长是35米，它的宽是多少米？

下表中有关人体细胞化合物的各项内容，正确的是

    Hans Christian Andersen, a great Danish (丹麦的) writer, is very famous for his fairy tales (童话). He wrote a lot of best-known stories such as The Emperor's New Clothes and The UglyDuckling. His fairy tales have brought happiness to children across the world. The tales have versions (版本) of over a hundred languages.

    Andersen was born in Denmark in 1805. When he was still a young boy, he was already very clever and imaginative (富于想象力的). He created a small toy theatre and made clothes for his puppets (木偶). He also loved reading.

    In 1816, his father died and he learned to be a tailor (裁缝). Later he worked in a factory. At the age of fourteen, Andersen moved to the capital of Denmark to become an actor and gave performances (演出) in the Royal Danish Theatre. However, his voice changed when he grew older, so the job had to stop. Then he began to write poems and fairy tales.

    In the spring of 1872, Andersen fell out of bed and didn't get well again. He lived until 1875 and died peacefully at the home of his close friends.

珠江三角洲区域的核心城市是（　　）