蠕动
李清照
起升机构在突然提升、突然制动时会产生（），有可能造成起重机倾翻。 向心力。 离心力。 惯性力。
以下关于环境保护的内容说法正确的是（） 建设对环境有影响的项目，应在开工后提交环境影响评价报告。 建筑施工场界环境噪声排放限值为昼间70dBA.，夜间55dBA.。 建设项目的大气污染防治设施，在试生产或运营期间要进行验收并使用。 防治施工扬尘污染的措施费用，应列入工程造价。 对不符合民用建筑节能强制性标准的，不得颁发建设工程规划许可证、施工许可证。
You have just completed an OSPF implementation. While executing your verification plan, you determine that R1 is not able to establish full OSPF adjacency with R2. The show ip ospf neighbor comman d output on R1 shows that R2 is stuck in the INIT state. What could be the cause of this problem?（） DR and BDR election errors between R1 and R2.。 The R2 router has not received the OSPF hello packets from the R1 router.。 Mismatched interface ma ximum transmission unit (MTU) configuration between the R1 and R2.。 Mismatched OSPF hello interval configuration between the R1 and R2。 Corrupted LSAs exchanges between the R1 and R2.。
资本主义再生产周期的决定性阶段是（）阶段。
