轮虫在自然界通常只见到（），靠行孤雌生殖来繁衍后代，且繁殖力很强。 ["雄性","雌体","混交雌体","都不对"]
孔德认为人们的思想或智慧要经历的三个阶段依次是（） ["神学、实证、形而上学阶段","形而上学、神学、实证阶段","实证、神学、形而上学阶段","神学、形而上学、实证阶段"]
Click the Exhibit button. When designing a DWDM system with multiple amplified spans， a pre-amp is needed at Site B to （）. [" offset the OADM loss at site B"," overcome the high multiplexer loss at site A"," amplify signal levels after the high loss through Fiber Span 1"," adjust add channels at site B to be at the same level as the passthrough channels"," ensure that the per channel power is higher than the minimum needed for the post-amp at Site B"]
在用起重机吊运钢管时，在起重机（）范围内严禁站人。 ["回转半径","杠杆","吊运","旋转"]
下列适宜实施颈椎牵引的是：（） ["颈椎韧带不稳","寰枢关节半脱位并有脊髓受压症状","急性“挥鞭样”损伤","椎基底动脉供血不足","慢性颈背痛"]
固体润滑剂优点
