【名词&注释】
二氧化碳、可表示(can be expressed)、植物的光合作用
[单选题]植物的光合作用可表示为：二氧化碳 + 水 → 淀粉 + 氧气。根据以上信息，下列关于淀粉组成的说法中正确的是（ ）
A. 只含碳，氢元素
含有碳，氧，氢三种元素
含有碳，氢元素，可能含有氧元素
无法确定
查看答案&解析
举一反三：
[单选题]AHello，everyone! It's that time of year again! Hualin's fantastic sale! You name it， and we have it at a very good price． Do you like them at low prices? We have sweat-ers in all colors at 50 yuan each! Do you need a bag for sports or school? We have great .bags for just 6 yuan! For young boys and girls， we have T-shirts in red， green，yellow， orange， blue and black for only 15 yuan! And socks in all colors for just 1yuan! And that-s not all． Can-t you believe it? Come down to Hualin and see by your-self!
A. This passage is_________
B. a story
C. an advertisement(广告)
D. about family
E. about buying and selling
[单选题]23． The desk is _________．
A. on the bed
B. behind the chair
C. near the window
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