【单选题】What 3 words does Chris stress in this sentence: “You can understand me? Wow. Your English is amazing!”
B.
You, Wow, your english
C.
Understand me, Wow, amazing
D.
You, your english, amazing.
【单选题】Wow, you are in high spirits. _________ makes you so happy?
【判断题】重结晶是一种常用的固体有机物精制方法,通常包含溶剂的选择、热饱和溶液的配制、脱色、热过滤、结晶、减压过滤以及干燥结晶几个步骤。
【单选题】This is for you! [ ]
【简答题】D、E为中学化学常见的金属单质,F是一种黑色晶体。E与C的浓溶液在常温作用无明显现象,加热时则有大量无色气体产生,同时生成H。在一定条件下C、D间能发生反应。各物质转化关系如下图: (1)B的同素异形体的名称为_______ __;F的化学式为_____ ___ __。 (2)写出D与C的浓溶液反应的化学方程式 。 (3)用惰性电极电解A 溶液的阳极反应式为________ _ __ _。 (4)...
【简答题】已知常用的酸跟常用的碱反应生成的盐的水溶液显中性。现将某蓝色晶体A溶入某一无色中性液体中,按下图所示过程进行实验: 试按要求填写下列空白: (1)写出B、C溶液中溶质的化学式:B ,C ,蓝色沉淀D是 。 (2)若A是纯净物,无色中性液体是只含有一种溶质的溶液,则其溶质是 。 (3)写出有色液体与C溶液反应的化学方程式 。
【单选题】下列有关溶液的叙述正确的是 [ ]
B.
温度一定时,析出硝酸钾晶体的溶液未必是硝酸钾的饱和溶液
【单选题】What 3 words does Chris stress in this sentence: “You can understand me? Wow. Your English is amazing!”
A.
You, understand, English
D.
Understand, Wow, Amazing
【单选题】–Wow! What a nice skirt you are wearing! -________.
【单选题】-Wow! This is a marvelous room! You must spend a lot of time and energy in it. -_____________________.
A.
Great, I am very art-conscious.
B.
Thanks you. It really cost me that much.