【单选题】材料的渗透系数越小,其抗渗能力 ;材料的抗渗等级为 P4,其在渗水前所能承受的最大水压力为 。
【单选题】玻棒法检查精液黏稠度描述不正确的是
A.
将玻棒插入完全液化的精液,提拉玻棒,观察拉起的黏丝及其长度
B.
操作简便,但结果的准确性、重复性受主观因素影响
C.
黏稠度可分为分级 I 级、 II 级和 III 级
【单选题】施工单位应当在电梯安装、改造、重大维修工程竣工并经监督检验合格后 __ ,将安全技术资料移交建设单位或者电梯使用单位,办理相关移交手续;建设单位在向电梯使用单位移交电梯时,应当同时移交安全技术资料。
【简答题】阅读理解。 When Ben Franklin was only a boy, he always wanted to know about things. He was always asking his father and brothers 'What?' and ' How?' and 'Why?'. They couldn't always tell him what he wanted...
【单选题】当前我国九年制义务教育学制年限划分采用的是( )。(2012年下半年真题)
【简答题】When Ben Franklin was only a boy,he always wanted to know about things. He was always asking his father and brothers “What?”and “How?” and “Why?” They couldn't always tell him what he wanted to know. ...
【判断题】陈某在运输毒品过程中,携带了一把五四式手枪用于掩护,但未使用。陈某的行为属于武装掩护运输毒品。( )
【单选题】当前我国九年制义务教育学制年限划分采用的是( )。[2012下5.]