根据题意填空。
①它的皮                                     ，微微泛出淡青色。（茅盾《白杨礼赞》）
②但愿人长久，                        。（苏轼《水调歌头》）
③                          ，归雁入胡天。（王维《使至塞上》）
④《泊秦淮》中表现诗人关心国家命运，抨击黑暗现实的句子是                         ，                          。
⑤《无题》中运用比喻、双关的手法，表现至死不渝的爱情和无私奉献精神的句子是                         ，                               。
⑥苏轼在《水调歌头》里面说的“                       ，                           。”两句，阐释了人生没有十全十美这一哲理。

材料：我国第四套人民币中的一元硬币是钢芯镀镍（Ni），镍与稀硫酸能发生下列反应：Ni+H₂SO₄═NiSO₄+H₂↑． 根据此材料及金属活动性顺序，请回答：

（1）铸造硬币用到的材料是____（填“合成材料”或“金属材料”）；

（2）写出Ni与CuSO₄溶液发生置换反应的方程式____ ．

How many        ? 

    It's a rainy Saturday. Mary and her family are spending the afternoon at home. Her uncle and aunt are visiting them.

    Mary's father, Mr Harris, and her uncle and aunt are in the living room. Her father is drawing a picture and her uncle and aunt are watching the news on TV. They are also talking.

    Mary's elder brother, Peter, is in his bedroom playing computer games. He is a computer fan and he spends much time playing on the computer. His younger brother, Jim, is also in the living room. He is playing with his model cars.

    Mary's mother, Mrs Harris, is in the kitchen preparing food for all of them. She is making some hamburgers and orange juice.

    Mary is talking to her friends, Lucy and Tom. They are from another town and want to draw pictures and play with Mary.

    Fluffy, the family cat, is sleeping on the kitchen's sofa. He is a lazy cat. Fluffy eats a lot, and he is a really fat cat.

回答下面5个问题，每题答案不超过8个词。

如图所示，是感应式电能表的示意图，与其技术参数有关的说法正确的是（　　）