如图所示，尺寸30、60为()尺寸。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/f89d9ea80763453f9dd8ea034cf71356.jpg
举一反三
- 如图所示，尺寸4×Φ10为()尺寸。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/7139d87e5e3f4397b20cfdeab77d5acc.jpg
- 下列尺寸标注正确的是（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/79ed6f04ee2f415c917c9f280eccf07e.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/4677ac7155c849bebe9d2ffd7458f4c4.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/489ad68ff6294831bc43fa08990b59b7.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/e829c514224942f1926c1823be08d3e7.png">
- 下图所示序列f(k)闭合表示式为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/e3088842d7014311aa5241014415b8f3.bmp
- 图示桁架，EA=常数， E两点的相对水平位移为：http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/b795326547a046a188fdb63759388318.png
- 周期信号f(t)如下图所示，其直流分量为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/bb02e5afe3fa474093913374442813ab.png