钢板桩施工中，打入桩时和已打入的邻桩一起下沉的现象称为水平伸长。
乌鲁木齐市每年需要防寒的树种有（） ["月季","垂榆","榆叶梅","小叶白蜡"]
An access list has been designed to prevent HTTP traffic from the Accounting Department from reaching the HR server attached to the Holyoke router. Which of the following access lists will accomplish this task when grouped with the e0 interface on the Chicopee router（）。 [" permit ip any any deny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80"," permit ip any any deny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80"," deny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80 permit ip any any"," deny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80 permit ip any any"]
常用的防寒措施是（） ["灌冻水","根部培土","涂白喷白","积雪"]
下列运放参数中（）数值越小越好。 ["输入电阻","输入失调电压","共模放大倍数","差模放大倍数"]
进行螺旋筋柱正截面受压承载力计算时，有哪些限制条件？为什么要作出这些限制条件？
