1/5单选题
难度：
1.三种材料的密度之比为3：2：1，制成相同高度的圆柱体竖立在水平桌面上，它们对桌面产生的压强之比是（ ）
| A | 1:2:3 |
| B | 3:2:1 |
| C | 1:1:1 |
| D | 9:4:1 |
- 提示1：
- IOW3suefpeWvhuW6puS5i+avlOS4ujPvvJoy77yaMe+8jOmrmOW6puebuOetie+8jOWPr+agueaNruafseS9k+WOi+W8uuWFrOW8j3A9z4FnaOaxguWHuuWOi+W8uuavlA==
正确答案：Qg==
PGRpdj7lt7Lnn6Xlr4bluqbkuYvmr5TkuLoz77yaMu+8mjHvvIzpq5jluqbnm7jnrYnvvJvlj6/moLnmja7mn7HkvZPljovlvLrlhazlvI9wPc+BZ2jvvIzmsYLlh7rljovlvLrmr5TkuLozOjI6Me+8jOaJgOS7pemAieaLqULpgInpobnjgII8L2Rpdj4=
2/5单选题
难度：
2.甲、乙、丙三个实心正方体分别放在水平地面上，它们对水平地面的压强相等，已知三块物体的密度关系为ρ甲＞ρ乙＞ρ丙，若把它们的边长关系（ ）
| A | Ｌ甲=Ｌ乙=Ｌ丙 |
| B | Ｌ甲＜Ｌ乙＜Ｌ丙 |
| C | Ｌ甲＞Ｌ乙＞Ｌ丙 |
| D | 以上都有可能 |
- 提示1：
- IOW3suefpc+BPHN1Yj7nlLI8L3N1Yj7vvJ7PgTxzdWI+5LmZPC9zdWI+77yez4E8c3ViPuS4mTwvc3ViPu+8jOS4ieiAheWOi+W8uuebuOetie+8m+agueaNruafseS9k+WOi+W8uuWFrOW8j3A9z4FnaOWPr+S7peaxguWHuui+uemVv+WFs+ezuw==
正确答案：Qg==
PGRpdj7lt7Lnn6XPgTxzdWI+55SyPC9zdWI+77yez4E8c3ViPuS5mTwvc3ViPu+8ns+BPHN1Yj7kuJk8L3N1Yj7vvIzkuInogIXljovlvLrnm7jnrYnvvJvmoLnmja7mn7HkvZPljovlvLrlhazlvI9wPc+BZ2jvvIzlj6/ku6XmsYLlh7rovrnplb/lhbPns7vvvKw8c3ViPueUsjwvc3ViPu+8nO+8rDxzdWI+5LmZPC9zdWI+77yc77ysPHN1Yj7kuJk8L3N1Yj7jgILmiYDku6XpgInmi6lC6YCJ6aG544CCPC9kaXY+
3/5单选题
难度：
3.
甲、乙两个由金属制成的实心正方体放在水平桌面上，它们的密度之比为2：5，边长之比为3：1，则（ ）
| A | 甲、乙的质量之比为6：5 |
| B | 甲、乙的重力之比为12：5 |
| C | 甲、乙对水平面的压力之比是54：6 |
| D | 甲、乙对水平面的压强之比是 6：5 |
- 提示1：
- PHA+5L2T56ev5q+U5Li6Mjc6Me+8jOi0qOmHj209z4FW55+l6LSo6YeP5q+U5Li6NTQ6NTwvcD4=
- 提示2：
- PHA+6YeN5Yqb5LmL5q+U44CB5Y6L5Yqb5LmL5q+U5LiO6LSo6YeP5LmL5q+U55u4562JPC9wPg==
- 提示3：
- PHA+5p+x5L2T5Y6L5by65YWs5byPcD3PgWdo77yM5YiZ5pyJ5Y6L5by65YWs5byP5Li6Nu+8mjU8L3A+
正确答案：RA==
PGRpdj7otKjph49tPc+BVuefpei0qOmHj+avlOS4uiw1NDo177yb6YeN5Yqb5LmL5q+U44CB5Y6L5Yqb5LmL5q+U5LiO6LSo6YeP5LmL5q+U55u4562J77yM5YiZQeOAgULpgInpobnpg73kuI3mraPnoa7vvIxD6YCJ6aG55q2j56Gu44CC5p+x5L2T5Y6L5by65YWs5byPcD3PgWdo77yM5YiZ5pyJ5Y6L5by65q+U5Li6Nu+8mjXvvIzliJlE5q2j56Gu44CC5omA5Lul6YCJ5oupROmAiemhueOAgjxicj48L2Rpdj4=
4/5单选题
难度：
4.把一块砖平放在水平地面上，它对地面产生的压强为P，若把8块砖同样的砖按图所示放在水平地面上，则它们对地面产生的压强为（ ）
| A | 8p |
| B | 4p |
| C | 2p |
| D |  |
- 提示1：
- IOS4gOWdl+egluW5s+aUvuWcqOawtOW5s+WcsOmdouS4iu+8jOWug+WvueWcsOmdouS6p+eUn+eahOWOi+W8uuS4unDvvIzlnKjov5nlnZfnoJbkuIrliqDkuIDlnZfnoJbvvIznm7jlvZPkuo7kvb/noJbnmoTpq5jluqblop7liqDkuIDlgI3vvIzmoLnmja7mn7HkvZPljovlvLrlhazlvI9wPc+BZ2jvvIzliJnnn6XljovlvLrlkIzmoLflop7lpKfkuIDlgI0=
- 提示2：
- IOe7p+e7reaUvueglu+8jOmrmOW6puS4jeWPmO+8jOWvhuW6puS4jeWPmO+8jOWImeWOi+W8uuS4jeWPmA==
正确答案：Qw==
PGRpdj7kuIDlnZfnoJblubPmlL7lnKjmsLTlubPlnLDpnaLkuIrvvIzlroPlr7nlnLDpnaLkuqfnlJ/nmoTljovlvLrkuLpw77yM5Zyo6L+Z5Z2X56CW5LiK5Yqg5LiA5Z2X56CW77yM55u45b2T5LqO5L2/56CW55qE6auY5bqm5aKe5Yqg5LiA5YCN77yM5qC55o2u5p+x5L2T5Y6L5by65YWs5byPcD3PgWdo77yM5YiZ55+l5Y6L5by65ZCM5qC35aKe5aSn5LiA5YCN77yb57un57ut5pS+56CW77yM6auY5bqm5LiN5Y+Y77yM5a+G5bqm5LiN5Y+Y77yM5YiZ5Y6L5by65LiN5Y+Y44CC5omA5Lul5pyA5ZCOOOWdl+egluWmguWbvuaUvue9ruWOi+W8uuS4ujJw77yM6YCJ5oupQ+mAiemhueOAgjwvZGl2Pg==
5/5单选题
难度：
5.两个正方体金属块A、B密度ρA：ρB为27：16，边长LA：LB=2：3，按如图叠放在水平地面上，金属块A对金属B的压强P1，若取走金属块A，金属块B对地面压强为P2，则P1：P2=（ ）
| A | 3:2 |
| B | 16:27 |
| C | 9:8 |
| D | 9:4 |
- 提示1：
- IOW3suefpemHkeWxnuWdl0HjgIFC5a+G5bqmz4E8c3ViPkE8L3N1Yj7vvJrPgTxzdWI+Qjwvc3ViPuS4ujI377yaMTbvvIzovrnplb9MPHN1Yj5BPC9zdWI+77yaTDxzdWI+Qjwvc3ViPj0y77yaM++8jOagueaNruafseW9ouWOi+W8uuWFrOW8j1A9z4FnaOWPr+axguWHuuWOi+W8uuavlA==
正确答案：Qw==
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