Look at the girl. Her name is Lucy. And this lovely girl is her twin sister Lily.1parents are both （两者都）teachers. They work hard.

    Lucy and Lily2at No.4 Middle School. They go to school3Monday to Friday. They have no classes on Saturdays and Sundays. They have breakfast at 6:30. They go to school at 7:00. Classes

    4at eight. They have four5in the morning and three in the afternoon. They have6at 12: 15. At 3:50,they have sports.

    Lucy and Lily study Chinese, math, English, geography, physics, history and other lessons. Lucy's favorite7is music,8it's relaxing. Lily likes science best. She thinks it's difficult 9interesting.

    Their parents like reading. They often read books at home. Their parents are strict(严厉地)with  them, but sometimes they are very kind and friendly to their children. Lucy and Lily love their10 very much.

在第33个世界环境日到来之时，国家环保总局首次推出了世界环境日中国标识。标识采用代表海洋的大面积蓝色，由“浪花”（A）    、 “鸟”“手”以及（B）“珍珠”的图形组成。“浪花”象征海洋的珍贵，提醒人们与海洋和谐相处（C）   ；   “鸟”颈的空白处象征渤海湾，与“渤海碧海行动计划”相呼应。各种图案统一在圆形中，体现了中国传统文化中（D）《天人合一》这一哲学思想。

将含盐15％的盐水30千克，蒸发成含盐90％的食盐颗粒，需要蒸发掉多少千克的水？