图示结构C截面弯矩为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/4f75b4fba9ff4be1b04a5e100c86c65e.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/145877d7a442497f9fe1266fa394ba2e.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/1b6f8295e7bc44b0b8a2bee20e062fc4.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/18776e34a7504dfcbe40fbdf73958b14.png" /> D: 0

如图所示，直线CD是（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/3e2652461b4e405c943459cc03d55955.jpg

如果想要改变scratch显示的语言，应该点击哪个图标？ A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/1bded78c5d3b4c02b8537e3a820552f7.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/6c31384ced4e441db596e354ec3ed1eb.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/1fc4d7ad5746489681ffe8f3a9068cdf.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/2fe104d8b0194718a8b6b83663f83cb4.png">

如主视图所示，三棱锥被截切，俯视图和左视图正确的是（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/f6dde245be3a4ac286b637f07e1484fc.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/04ae2221fc904cc1ac1caca4daaa8ab1.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/e451d56ab1524240b603f2fa47aad33b.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/0550413aeb5b436c88589bf8de2029af.png">

http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/8d2340ba2c414ed7a2ddbdf13c1eec0f.png