百度商业推广和自然搜索结果的关系是什么?
游标卡尺的零误差为-0.2mm,游标卡尺直接读得的结果为20.25mm,那么物体的实际尺寸为()。 ["20.65mm","20.45mm","20.35","20.25mm"]
在循环血液中出现不溶于血液的异常物质,并随着血液流动,继而阻塞血管腔,这种现象称为()。 ["栓塞","血栓形成","梗死","血管阻塞","血栓栓塞"]
冠状动脉前降支栓塞可引起()。 ["室间隔后1/3心肌梗死","左心室后壁心肌梗死","左心室前壁心肌梗死","右心室心肌梗死","左心室侧壁心肌梗死"]
内测千分尺的分度值一般为()。 ["0.05mm","0.02mm","0.01mm","0.001mm"]
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