【单选题】Lack of imagination is an obstacle ______ one's advancement.
【简答题】静滑动摩擦力等于最大静滑动摩擦力时物体的平衡状态,称为 。
【单选题】They had no opportunities____advancement.
【判断题】呈缴本的入藏应符合本馆的文献入藏原则和范围,征集的品种、数量应达到地方正式出版物的50%以上。
【单选题】According to the passage, which of the following was NOT a means of advancement of the Spanish Empire in the New World?
B.
Subjugation of Indians.
C.
Establishment of semi-military governments.
D.
Treaties and negotiations.
【单选题】本题那项不符合疏散指示标志的防火检查内容要求:_____
A.
按照国家规范和标准对消防应急照明的设置要求,检查安全出口、疏散走道等应设消防应急照明的部位及场所是否设置,照明灯具的完好情况;
B.
测试应急照明灯具的故障按钮,检查其蓄电池或备用电源的状态;
C.
拔下应急照明灯具的插头,检查其是否在5s内自动切换成应急电源;
【单选题】造成压缩机因排气温度高而联锁停车的原因是().