回答下列问题：

根据短文内容判断正误。

    U2 is the name of a band from Ireland. It's one of the most famous rock bands in the world.

    In l978, a l7-year-old high school student, Larry Mullen, looked for some musicians to make a band. Finally, he found another three boys and they set up a band. The four boys named their band U2.

    They travelled a lot and gave concerts in many countries. More and more people got to know them and love their music. Many of their songs, such as Beautiful Day and Walk On, were popular. In the l980s, the band became famous.

    Now the four members of U2 are still good friends and their music is still popular. People in the world still enjoy their music.

阅读《广玉兰》，回答问题。

       广玉兰开花有早有迟，在同一棵树上，能看到花开的各种形态。有的含羞待放，碧绿的花苞鲜嫩可爱。有的刚刚绽放，几只小蜜蜂就迫不及待地钻了进去，那里面椭圆形的花蕊约有一寸长。盛开着的玉兰花，洁白柔嫩得像婴儿的笑脸，甜美、纯洁，惹人喜爱。先前热热闹闹开过的广玉兰花呢，花瓣虽然凋谢了，花蕊却依然挺立枝头，它已长成近两寸长的圆茎。圆茎上面缀满了像细珠似的紫红色的小颗粒，这就是孕育着新生命的种子。远远看上去，一株广玉兰就像是一个数世同堂，生生不息的大家族。

作者依次描写了广玉兰花开的不同形态：____、____和____。

研究“100毫升水能溶解多少克食盐”中，需要准备的仪器是____。