问题
选择题
下列混合物不适合用过滤的方法分离的是[ ]
A．混有泥沙的水
B．白糖和食盐
C．混有泥沙的食盐
D．用过氧化氢与二氧化锰制氧气后回收二氧化锰
答案
答案：B
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下列混合物不适合用过滤的方法分离的是[ ]
A．混有泥沙的水
B．白糖和食盐
C．混有泥沙的食盐
D．用过氧化氢与二氧化锰制氧气后回收二氧化锰
答案：B
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| Can flowers sing? You must be 1 to find the answer is 'YES'. And the plants can sing, 2 Flowers are beautiful and they 3 nice. Most people 4 to plant them. If they can sing for us, it's really wonderful. In fact, the flowers or plants in vases really can sing. 5 can they sing? That's because there is a speaker system (音响系统) inside the vases . The speaker system uses the flowers or plants to make 6 . If you like the music or song very much, you can 7 the music or the song 8 the plants in your garden . Music and plants are 9 for you. Do you like to 10 your plants an  d flowers? Now not only you can talk to them but also for you . | ||||
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