A:①、②、③依次代表单糖、二糖、多糖,它们均可继续水解
B:①、②均属还原糖,在加热条件下与斐林试剂发生反应将产生砖红色沉淀
C:④、⑤分别为纤维素、肌糖原,二者均贮存能量,可作为储能物质
D:④是植物细胞壁的主要成分,使用纤维素酶可将其破坏
如图所示,S为发光点,试画出经平面镜MN反射后通过A点的反射光线和相应的入射光线。
2014年12月4日是第一个国家宪法日。设立国家宪法日( )
My name is Jim. My favorite day is October 18th, because it's my birthday. I am very happy on that day. I eat eggs for breakfast. Then my friends come to my home and play with me. We sing and dance. Someone plays the piano and someone plays the guitar. Lunch is very nice. After lunch, my parents take me to see a movie. My favorite movies are action movies(动作片). After supper, my parents, my sister and I watch TV. Then I go to bed at ten thirty. I don't do my homework on that day. I am very tired but happy on my birthday.