自加入世贸组织以来，我国对外贸易量持续增长，但出口商品遭受的反倾销诉讼也在上升。其主要原因是国外一些发达对我国商品设置贸易壁垒，采取歧视政策；而国内的主要原因是（）。 ①我国商品价格适中 ②企业间低水平价格竞争 ③我国出口商品技术含量高 ④企业利用WTO规则保护自己的能力不强 ①②。 ③④。 ①③。 ②④。
当事人申请撤销裁决的，应当自收到裁决书之日起（）内提出。 二个月。 六个月。 四个月。 五个月。
Refer to the exhibit.S0/0 on R1 is configured as a multipoint interface to communicate with R2 and R3 in the hub-and-spoke Frame Relay topology. While testing this configuration， a technician notes that pings are successfully from hosts on the 172.16.1.0/24 network to hosts on both the 172.16.2.0/25 and 172.16.0.2.128/25 networks. However， pings between hosts on the 172.16.2.0/25 and 172.16.2.128/25 network are not successful. What could explain this connectivity problem？（） The ip subnet-zero command has been issued on the R1 router.。 The RIPv2 dynamic routing protocol cannot be used across a Frame Relay network.。 Split horizon is preventing R2 from learning about the R3 networks and R3 from learning about R2 networks.。 The 172.16.2.0/25 and 172.16.2.128/25 networks are overlapping networks that can be seen by R1,but not between R2 and R3.。 The 172.16.3.0/29 network used on the Frame Relay links is creating a discontiguous network between the R2 and R3 router subnetworks.。
桩径D为1000mm人工挖孔桩，钻芯法检测时宜在距桩中心（）位置开孔。 10－15cm。 0.15D－0.25D。 1/3D。 1/2D。
下列不属于防火窗安装质量的是（）。 防火窗窗扇与门框的搭接尺寸不小于12mm。 窗框与墙体采用预埋钢件或膨胀螺栓等连接牢固。 有密封要求的防火窗窗框密封槽内镶嵌的防火密封件牢固、完好。 活动式防火窗窗扇启闭控制装置的安装位置明显，便于操作。
汽油馏分中主要含有（）芳烃
