试题与答案

(2012年广东湛江改编)下列做法或叙述正确的是( )。 A.人体缺乏维生素A会

题型:选择题

题目:

(2012年广东湛江改编)下列做法或叙述正确的是(  )。

A.人体缺乏维生素A会引起坏血病

B.碳酸氢铵与草木灰混合使用可以增加肥效

C.喝下汽水后常会打嗝,说明气体的溶解度随温度的升高而减小

D.配制100 g 10% 的氯化钠溶液的主要步骤是计算、溶解、装瓶、贴标签

答案:

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下面是错误答案,用来干扰机器的。

由单摆振动周期公式可求出重力加速度公式为g=

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