【单选题】【消耗次数：1】
侏儒症是因垂体的生长激素分泌过（ ）
①
多
②
少
③
快
④
慢
参考答案：
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婴幼儿体内生长激素分泌最旺盛的时间段是( )。
①
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②
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③
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④
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随机题目
【单选题】
既能使石蕊试液变红，又能使品红试液变为无色，还能使溴水褪色的是（）。
①
<img class="kfformula" src="20200629/1593437261129283.png" data-latex="{SO}_{2}" width="50" height="33"/>
②
<img class="kfformula" src="20200629/1593437261775483.png" data-latex="{H}_{2}S" width="48" height="31"/>
③
<img class="kfformula" src="20200629/1593437261194518.png" data-latex="{C1}_{2}" width="47" height="34"/>
④
<img class="kfformula" src="20200629/1593437261658410.png" data-latex="CO" width="39" height="32"/>
【单选题】
往浅绿色的<img class="kfformula" src="20200629/1593440702516364.png" data-latex="{Fe(NO}_{3}{)}_{2}" width="70" height="35"/>溶液中逐滴加入稀盐酸后，溶液的颜色应该是（ ）。
①
变棕黄色
②
没有改变
③
逐渐加深
④
颜色变浅
【单选题】
在香港拍卖会上，保利集团花费3000多万港币购回火烧圆明园时流失的国宝：铜铸的牛首、猴首和虎首。普通铜器时间较长容易出现铜绿，其主要成分是[<img class="kfformula" src="20200623/1592890122730612.png" data-latex="{Cu}_{2}{(OH)}_{2}{CO}_{3}" width="105" height="30"/>]。这三件1760年铜铸的国宝在240年后看上去依然熠熠生辉，不生锈，下列对其原因的分析，最可能的是( )。
①
它们是含一定比例金、银、锌的铜合金
②
铜的活动性比氢小，因此不易被氧化
③
它们的表面都镀上了一层耐腐蚀的黄金
④
环境污染日趋严重，它们表面的铜绿被酸雨溶解洗去
【单选题】
计算<img class="kfformula" src="20200624/1592993098219071.png" data-latex="{71gC1}_{2}" width="79" height="31"/>所含原子数为（ ）<img class="kfformula" src="20200624/1592993098786896.png" data-latex="{N}_{A}" width="43" height="33"/>。
①
0.5
②
2
③
4
④
35.5