题目

可用来制备抗凝血药,通过下列路线合成： （1）A与银氨溶液反应有银镜生成,写出该反应的离子方程式                         。 （2）B→C的反应类型是______________________________________。 （3）写出D→E的化学方程式: _____________________________________。 （4）写出F和过量NaOH溶液共热时反应的化学方程式:_____________________________。 （5）下列关于G的说法正确的是______________。 a.能与溴单质反应           b.能与金属钠反应 c.1 mol G最多能和3 mol氢   Free On-line Short Stories For Kids: Trevor The Taxi    In this children's story, suited to younger children, we have an adventure with Trevor. He is a taxi. Trevor loves his life:    “Sometimes he takes patients to the nursing home, where they can get better after being ill, and sometimes he takes people home when they have been shopping, and Stan puts all their packages inside Trevor's boot, so they will not get wet or broken.”    The black cab, in this adventure, goes far beyond the call of duty whilst he achieves his wildest dreams! What could this be? Well you will just have to read this short story for yourself!    Free On-line Short Stories For Kids: The Girl Who Believed In Fairies    The fairy queen is upset and the elves just don't know what to do:    “Oh, oh," sobbed the queen, getting her hankie all wet with her constant crying. For the twelfth time that day, Elgie the chief elf took her hankie and wrung it out on to the carpet of grass that grew all around the palace.”    How will they manage to help the queen? Why was she so unhappy? There is only one person that can help! Can she do it? This is a lovely fairy tale that will glow the embers of your heart - only for young little princesses!    Free On-line Short Stories For Kids: The Envious Kings    This story is suitable for 6 years and upwards.    Unfolding in the story pages of this recommendation is a children's story about two kings who were competing with each other:    “In spite of the easy life that the two kings had, they were not happy, for each of them kept thinking that the other one had a bigger and better palace, or owned more horses, or had more jewels or even had creamier milk.”    They were both petty and, through their envy, they caused themselves much trouble. Who do you think saved the day? Well, you will just have to read the story to find out!    Free On-line Short Stories For Kids: The Wise Old Woman    This story is probably suited to the 8 years old age range and upwards, although would appeal to adults, alike.    Here I introduce you to one of my kids on-line stories listed on the writing and literature section of Hubpages. In this parable you will find a magical world of wisdom involving trees, people and someone very special.    “As she stood and watched, the knowledge melted into her and the sapling grew...The magical transition took her breath away and as she watched on with ore, she noticed something strange.”    So, what was this strangeness and magical transition? Let me leave you with wonderment ... and a click of the link!    Free On-line Short Stories For Kids: Unusual Stories - Faffenburger's Odyssey    This story is probably more suited to the older child. So who is Faffenburger? Well with one of these free on-line short stories for kids, we enter into a different realm. A world of nonsense as Faffenburger moves within alpha and omega. This is a rather unusual story as you will find out!    “My friend, Henry Faffenburger stomped down the long lane on his short stumpy legs, moonlight glancing off his bald-spot, which was a little surprising as there was no moon that night. As he rounded the bend, he saw a pair of headlights coming toward him. They drew level, and stopped. A small man with yellow eyes emerged from the darkness behind the lights, and enquired if Faffenburger would like a lift.    "Where are you going ?" asked my friend. "Wherever you want to go", replied the owner of the yellow eyes.”    So, the adventure begins! Where will they go? Alpha, Omega or just the middle? After all, it was a long summer - especially the middle! Take a closer look at this - you might find something a little more strange and a little more hidden that you have noticed before. Intrigued? Well you should be with Faffenburger's Odyssey! 46. Which story is more well-received by young girls?    A. Trevor The Taxi                                     B. Faffenburger's Odyssey    C. The Wise Old Woman                            D. The Girl Who Believed In Fairies 47. You can find the description of a night scene in _______?    A. The Envious Kings                                 B. The Girl Who Believed In Fairies    C. The Wise Old Woman                            D. Faffenburger's Odyssey 48. According to the passage, the kings in “The Envious Kings” can be described as_______?    A. Jealous              B. powerful                         C. rude                       D. ugly 49. Who will most probably find the passage useful?    A. parents with children                              B. children who love to surf the Internet    C. teachers in high school                             D. experts who concern children