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【简答题】
心理健康的标准是什么?
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皮皮学刷刷变学霸
举一反三
【单选题】What 3 words does Chris stress in this sentence: “You can understand me? Wow. Your English is amazing!”
A.
You, understand. Wow
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?
A.
What it is that
B.
What is it that
C.
What is that
D.
What it that
【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。
A.
正确
B.
错误
【单选题】This is for you! [     ]
A.
Wow! Thank you.
B.
Let's go to school!
【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 [     ]
A.
一杯食盐水,下部分比上部分咸
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
C.
物质溶于水时,常使溶液的温度发生改变
D.
75%的医用酒精消毒液,溶剂是酒精
【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
B.
You, Wow, English
C.
You, English, Amazing
D.
Understand, Wow, Amazing
【单选题】–Wow! What a nice skirt you are wearing! -________.
A.
Thank you            
B.
I think so        
C.
No, it’s bad
【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.
C.
Don't mention it.
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