It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime.由二苯并-1,3-二氧杂 - 环辛烷 -2- 羧酸经两步反应制得, 总收率70%....
用你自己的话解释下面的句子或句子的一部分.Paraphrase the following sentences or parts of sentences using your own words.有些程度副词可修饰形容词, 其它副词或句子.Some adverbs of degree can modify adjectives, other adverbs, or clauses.becauseof用在句首或句子后面, 表示原因.It...
His voice rose almost to a scream.他提高了嗓门，几乎在尖叫。Then he heard a piercing scream echoing down the deep well, ending in a dull, dead thud.接着他听见深井里回响起一声刺耳的尖叫，然后是砰的一声闷响，再之后就什么也听不见了。He's an absolute scream in our friends....
He snapped his fingers, and Wilson produced a sheet of paper.他打了个响指，威尔逊便递过一张纸来。" I can't complain, " answered Wilson unconvincingly. " When are you going to sell me that car? "“ 还可以, ” 威尔逊缺乏说服力地回答, “ 你什么时候才把那部车子卖给我?...
We must respond to well-founded criticism with a willingness to change.对于有根有据的批评，我们必须乐意作出改变。Self-discipline, willingness, enthusiasm, that's what you must depend on.自律、自愿与热情，这是你所必须依仗的。His presence is indicative of h...