如图所示某植物上的绿叶经阳光照射24h后，脱色并用碘液处理，结果锡箔覆盖的部位不呈蓝色，而不被锡箔覆盖的部位呈蓝色．该实验可以证明（    ）

①光合作用需要二氧化碳

②光合作用需要光

③光合作用需要叶绿体

④光合作用放出氧

⑤光合作用制造淀粉

黑头发黄皮肤的中国人，却对红色情有独钟。红色代表了喜庆、祥和、热烈、奔放，中国红记载着中国人的心路历程，经过世代承启、沉淀、深化和扬弃，成为中国文化的底色。这主要表明（    ）

如图所示是甲、乙、丙三位同学在做“用电流表测电流”的分组实验中，闭合开关前，电流表的指针都指在零刻度处．当闭合开关后，发现电流表的指针摆动出现了如图甲、乙、丙所示的三种情况．请将电流表在使用时出现的问题写在横线上

（1）甲同学的问题： ____．

（2）乙同学的问题： ____．

（3）丙同学的问题： ____．

    Swedish businessman Nile Bergqvist is delighted with his new hotel, the world's first igloo(冰屋) hotel.

    ____(build) in a small town, it has been attracting lots of visitors but soon the fun will be over. In two weeks' time Bergqvist's ice creation ____(be) nothing more than a pool of water. “ We don't see it as a big problem,” he says. “ We just look forward to replacing it.”

    Bergqvist built his first igloo in 1991 for an art exhibition. It was ____successful that he designed the present one,____ measures roughly 200 square meters. Six workmen spent more than eight weeks ____(put)1, 000 tons of snow onto a wooden base；when the snow froze, the base ____(remove).

    After their stay, all visitors receive ____(congratulate) and a survival certificate recording their success.____ no windows, nowhere to hang clothes and temperatures below 0°C, it may seem more like a survival test ____a relaxing hotel break. “It's great fun,” Bergqvist explains, “As well as a good start in survival training.”

    The popularity of the igloo is beyond doubt：it is now attracting tourists from all over the world. At least 800 people have stayed at the igloo this season even ____ there are only 10 rooms.

按课文《阳光》填空。

阳光

阳光像金子，洒遍田野、高山和小河。

田里的禾苗，因为有了阳光，更绿了。

山上的小树，因为有了阳光，更高了。

河面闪着阳光，小河就像长长的锦缎了。

早晨，我拉开窗帘，阳光就跳进了我的家。

谁也捉不住阳光，阳光是大家的。

阳光像金子，阳光比金子更宝贵。

填一填；

田里的禾苗，因为有了阳光，更高了。

山上的小树，因为有了阳光，更____。

____，因为有了阳光，更____。