急急急！！！各位帮帮忙，10个判断题，必须答对，一道2分。
\u4e00\u6b21\u667a\u529b\u6d4b\u9a8c\u670910\u9053\u5224\u65ad\u9898\uff0c\u6bcf\u7b54\u5bf9\u4e00\u9898\u5f973\u5206\uff0c\u6bcf\u7b54\u9519\u4e00\u9053\u62632\u5206\u3002\u5c0f\u5f3a\u7b54\u5b8c\u4e8610\u9053\u9898\uff0c\u53ea\u5f9720\u5206\u3002\u4ed6\u7b54\u5bf9\u4e86\u51e0\u89e3\uff1a\u8bbe\u7b54\u5bf9\u4e86X\u9053\u9898
3X-(10-X)2 = 20
3X-20+2X = 20
5X = 40
X = 8
10-(3*10-20)/(3+2\uff09= 8
\u65b9\u7a0b\u4e0e\u7b97\u5f0f \u5e0c\u671b\u80fd\u6709\u5e2e\u52a9
\u672c\u9898\u5047\u8bbe\u7b54\u5bf9\u4e86x\u9053\u9898\u3002\u90a3\u4e48\u7b54\u9519\u7684\u5c31\u662f\uff0810-x\uff09\u9053\u3002\u53ef\u4ee5\u5f97\u5230\u4e0b\u5217\u65b9\u7a0b\u5f0f\uff1a
2x-\uff0810-x\uff09=14
\u6c42\u89e3\u5f97\uff1ax=8\u3002
\u90a3\u4e4810-x=2\u3002
\u5373\u7b54\u9519\u4e862\u9053\u9898\u76ee\u3002
2、对，例如自行车的链条
3、错，不锈钢不一定是高性能高速钢
4、对
5、错，应该是主要作用是散热，
6、对
7、错，技术管理
8、对，
9、错，精度高
10、错，应画出
1、错，平行投影
2、对，
3、错
4、对
5、错
6、对
7、错
8、对，
9、错
10、错
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