为了达到前期预防的目的，建设项目中的职业病防护设施应当（） 先于主体工程进行设计。 先于主体工程进行施工。 与主体工程同时设计、同时施工。 与主体工程同时设计、同时施工、同时投产使用。 与主体工程同时设计，先于主体工程施工、先于主体工程投产使用。
How dose a DHCP server dynamically assign IP address to host?（） Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.。 Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address must be made ,and another address is then assigned.。 Addresses are leased to host.A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.。 Addresses are permanently assigned so that the host uses the same address at all times.。
学前儿童运动系统有何特点？如何做好学前儿童运动系统的卫生保健工作？.
OT作业治疗
历史的研究方法
农用养份循环中，氮素的损失途径包括（）
