药剂防治害虫的最佳时期是（）。 卵期。 幼龄幼虫（若虫）期。 大量取食的高龄幼虫（若虫）期。 成虫期。
You work as the enterprise exchange administrator at Company.com.The Company.com network consists of a single Active Directory domain named Company.com.Company.com has an Exchange Server 2010 organization.Company.com has headquarters in London and branch offices around the globe.the branch offices of.com are linked to the London offices with one ip site link.all offices of .com is configured as a separate active directory site.all the active directory site of Company.com contains an exchange server 2010 mailbox server and an exchange server 2010 hub transport server.you have received instructions from the cio to make sure that the e- mail sent between the active directory sites is routed through the hubtransport servers in the London offices. What should you do？（） The best option is to change the Exchange-specific site link costs by using the Exchange Management Shell.。 The best option is to change the site link costs by using the Active Directory Sites and Services.。 The best option is to get rid of the IP site links and create new SMTP site links by using the Active Directory Sites and Services.。 The best option is to setting up the main office site as a hub site by using the Exchange Management Shell.。
水处理构筑物的满水试验时，每次注水应读（）h的水位下降值，计算渗水量，在注水过程中和注水以后，应对池体作外观和沉降量检测；发现渗水量或沉降量过大时，应停止注水，待作出妥善处理后方可继续注水 A.10 。 B.12 。 C.24 。 D.48。
党的各级领导机关，除它们派出的代表机关和在非党组织中的党组外，都由上级党委任命产生。（）
罪犯三人以上集体脱逃的案件，属于（） 一般案件管辖。 重大案件管辖。 特殊案件管辖。 漏罪案件管辖。
土壤污染物对植物的危害可以分为（）两种。
