判断下面的词语是否正确。

花篮

在农业科研实验室里，用一定量的NH₄NO₃，和KH₂PO₄。的固体混合物配制无土栽培营养液，已知固体混合物中氮元素的质量分数为28％，则固体混合物中KH₂PO₄的质量分数为(    )

阅读下面这首诗歌，完成下面各题。

至正改元辛巳寒食日示弟及诸子侄^①

（元）虞集

江山信美非吾土，飘泊栖迟近百年。

山舍墓田同水曲，不堪梦觉听啼鹃。

【注】 ①这首诗作于元顺帝元年寒食日祭扫祖墓时。作者的先祖虞允文曾在宋高宗绍兴年间大破金兵，暂时稳定了南宋局面，但最终宋朝还是灭亡了。

用“who”或“that”填空
(1) The man____  is talking with my mother is my father .
(2) That book is the one____  I bought yesterday .
(3) He is one of the workers ____  been saved in that accident .
(4) They talked of the things and persons ____  they remembered in the factory .
(5) All____  can be done must be done .