1/5单选题
难度：
1.
“真金不怕火炼”的化学含义是
| A | 金的熔点低 |
| B | 金的导电性强 |
| C | 金是贵重金属 |
| D | 金的化学性质稳定 |
- 提示1：
- PHA+4oCc55yf6YeR5LiN5oCV54Gr54K84oCd6L+Z5Y+l6K+d55qE5ZCr5LmJ5piv77yM55yf55qE6YeR5Zyo54Gr54K855qE5p2h5Lu25LiL5oiQ5YiG5LiN5Lya5Y+R55Sf5pS55Y+Y77yM6L+Y5piv6YeR44CCPC9wPg==
- 提示2：
- PHA+5pys6aKY5piT6ZSZ6YCJQemhue+8jOWNs+S+v+eGlOWMluS5n+i/mOaYr+mHke+8jOatpOWkhOeahOaAleW5tumdnuaAleeGlOWMluOAgjwvcD4=
正确答案：RA==
PHA+4oCc55yf6YeR5LiN5oCV54Gr54K84oCd5piv5Zyo5o+P6L+w6YeR55qE5YyW5a2m5oCn6LSo6Z2e5bi456iz5a6a77yM5Zyo6auY5rip55qE5p2h5Lu25LiL5Lmf5LiN5Lya5Y+R55Sf5pS55Y+Y44CCPC9wPg==
2/5单选题
难度：
2.
下列做法，不能起到防锈作用的是
| A | 保留铁器表面的铁锈 |
| B | 在铁器表面镀锌 |
| C | 在金属机械上涂油 |
| D | 在车、船表面刷漆 |
- 提示1：
- PHA+5qC55o2u6ZOB55Sf6ZSI55qE5p2h5Lu25piv5LiO5rCn5rCU5ZKM5rC05o6l6Kem77yM5omA5Lul6Ziy5q2i6YeR5bGe55Sf6ZSI55qE5pa55rOV5pyJ77ya5py65qKw5LiK5raC5rK577yb5Zyo6YeR5bGe6KGo6Z2i5raC5LiA5bGC5rK55ryG77yb5Zyo6YeR5bGe6KGo6Z2i6ZWA5LiA5bGC5LiN5rS75rO855qE6YeR5bGe562J77yOPC9wPg==
正确答案：QQ==
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
3/5单选题
难度：
3.
铁是一种应用广泛的金属，下列有关铁的说法中，正确的是
| A | 铁丝在氧气中燃烧生成氧化铁 |
| B | 铁在干燥的空气中易生锈 |
| C | 铁是地壳里含量最多的金属元素 |
| D | 用铁锅炒菜可使食物中增加微量铁元素 |
- 提示1：
- PHA+5pys6aKY6ICD5p+l55qE5piv6YeR5bGe55qE5YyW5a2m5oCn6LSo77yM5Zyw5aOz5Lit5YWD57Sg55qE5YiG5biD5LiO5ZCr6YeP77yM5YWD57Sg5a+55Lq65L2T5YGl5bq355qE6YeN6KaB5L2c55So44CCPC9wPg==
正确答案：RA==
PHA+QeOAgSDpk4HkuJ3lnKjmsKfmsJTkuK3nh4Png6fnlJ/miJDlm5vmsKfljJbkuInpk4HvvIzmlYVB6K+05rOV6ZSZ6K+v77ybPGJyPkLjgIEg6ZOB5Zyo5rm/5ram55qE56m65rCU5Lit5a655piT55Sf6ZSI77yMQuivtOazlemUmeivr++8mzxicj5D44CBIOWcsOWjs+mHjOWQq+mHj+acgOWkmueahOmHkeWxnuWFg+e0oOaYr+mTne+8jOaVhUPor7Tms5XplJnor6/jgII8L3A+
4/5单选题
难度：
4.
铁制品在通常情况下很易生锈，制造时往往在铁制品表面电镀一层铜起防锈作用，下列说法正确的是
| A | 镀铜铁制品不可以在弱酸性条件下使用 |
| B | 镀铜铁制容器可盛硝酸银溶液 |
| C | 镀铜铁制品不易生锈的原因之一是使铁隔绝了空气 |
| D | 镀铜铁制品是一种合金 |
- 提示1：
- PHA+5qC55o2u6ZOB55Sf6ZSI55qE55+l6K+G6L+b6KGM5YiG5p6Q77yM6ZOB5Zyo5pyJ5rC05ZKM5rCn5rCU5bm25a2Y5pe25piT55Sf6ZSI77yM6Ziy6ZSI5bCx5piv5L2/6ZOB5LiO5rC05oiW5rCn5rCU6ZqU57ud77yMPC9wPg==
- 提示2：
- PHA+5ZCI6YeR5oyH55qE5piv5Zyo5LiA56eN6YeR5bGe5Lit5Yqg54Ot54aU5ZCI5YW25LuW6YeR5bGe5oiW6Z2e6YeR5bGe5b2i5oiQ55qE5YW35pyJ6YeR5bGe54m55oCn55qE5re35ZCI54mp77yOPC9wPg==
正确答案：Qw==
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
5/5单选题
难度：
5.
伽利略说：“生命如铁砧，愈被敲打，愈能发出火花。”其中蕴含的化学原理，用化学方程式表示正确的是
| A |
|
| B |
|
| C |
|
| D |
|
- 提示1：
- PHA+5pys6aKY6Zmk5LqG6ICD5p+l6YeR5bGe6ZOB55qE55u45YWz5oCn6LSo5aSW77yM6L+Y6ICD5a+f5LqG5YyW5a2m5pa556iL5byP55qE5Lmm5YaZ44CCPC9wPg==
- 提示2：
- PHA+6aaW5YWI6KaB5Yik5pat5p2h5Lu25piv5ZCm5q2j56Gu77yM5YW25qyh5rOo5oSP5q+P56eN54mp6LSo55qE5YyW5a2m5byP5piv5ZCm5q2j56Gu44CCPC9wPg==
正确答案：Qg==
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