【单选题】【消耗次数：1】
A: Smoking is forbidden in the workshop, please stop it. B: Sorry, [填空].
①
I am not sure
②
I have no idea
③
I do know
④
I did not know
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相关题目
【单选题】
A: Do you know that Tony quarreled with his brother? B: I dont know,[填空].
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nor dont I care
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nor do I care
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I dont care neither
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I dont care also
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I didn’t know what to do, but then an idea suddenly ________ to me.
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appeared
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happened
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occurred
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emerged
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Thats no excuse
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Dont mention it
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You neednt be
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No problem
【单选题】
I know the man by ____ but I have never spoken to him.
①
chance
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heart
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sight
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experience
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A: Are you ready for the test tomorrow? B: [填空] A: Come on, I am sure you will do well.
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Why do you ask?
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No. Im afraid not.
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【单选题】
A: Do you know Marks phone number? B: [填空] . A: OK. I might as well look it up in the phone book.
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Just a second
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【单选题】
With so much I am not sure if Ill have time for the game.
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had impressed
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impressed
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has impressed
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will do
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随机题目
【单选题】
下列离子方程式书写正确的是（ ）。
①
碳酸钙与盐酸反应：<img class="kfformula" src="20200706/1594026025912960.png" data-latex="C{O}^{\, \, 2-}_{3}+{2H}^{+}==={CO}_{2}\uparrow +{H}_{2}O" width="299" height="33"/>
②
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③
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④
铜片插入硝酸银溶液中:<img class="kfformula" src="20200628/1593329347670546.png" data-latex="Cu+{Ag}^{+}===Ag+{Cu}^{2+}" width="183" height="32"/>
【单选题】
下列物质中不会因见光而分解的是（ ）。
①
<img class="kfformula" src="20200706/1594027572463196.png" data-latex="{AgNO}_{3}" width="96" height="45"/>
②
<img class="kfformula" src="20200707/1594093115509398.png" data-latex="HCLO" width="83" height="40"/>
③
<img class="kfformula" src="20200706/1594027572201456.png" data-latex="{HNO}_{3}" width="84" height="45"/>
④
<img class="kfformula" src="20200706/1594027572890783.png" data-latex="{NaHCO}_{3}" width="120" height="45"/>
【单选题】
下列说法正确的是（ ）。
①
欲除去<img class="kfformula" src="20200706/1594027350354909.png" data-latex="{Cl}_{2}" width="49" height="36"/>中少量<img class="kfformula" src="20200706/1594027350127415.png" data-latex="HCl" width="50" height="32"/>气体，可将此混合气体通过盛饱和食盐水的洗气瓶
②
漂白粉有效成分是<img class="kfformula" src="20200706/1594027350766561.png" data-latex="CaC{l}_{2}" width="88" height="34"/>和<img class="kfformula" src="20200708/1594171459244978.png" data-latex="Ca(ClO{)}_{2}" width="92" height="31"/>，应密闭保存
③
向久置的氯水中滴入紫色石蕊试液，溶液将先变红后褪色
④
实验室用<img class="kfformula" src="20200706/1594027350321523.png" data-latex="{MnO}_{2}" width="90" height="36"/>和稀盐酸加热法制<img class="kfformula" src="20200706/1594027350257708.png" data-latex="{Cl}_{2}" width="58" height="34"/>
【单选题】
某元素x的气态氢化物化学式为<img class="kfformula" src="20200706/1594027764184798.png" data-latex="{H}_{2}X" width="59" height="35"/>，下面的叙述不正确的是( )。
①
该元素最高价氧化物的化学式为<img class="kfformula" src="20200706/1594027764536194.png" data-latex="{XO}_{3}" width="74" height="39"/>
②
该元素是非金属元素
③
该元素最高价氧化物对应水化物的化学式为<img class="kfformula" src="20200706/1594027764169500.png" data-latex="{H}_{2}{XO}_{3}" width="72" height="43"/>
④
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