煤中的灰分来自煤中（）。 ["原生矿物质","有机质","次生矿物质","外在矿物质"]
发动机气缸压力下降的原因有（）。 ["活塞环开口间隙过大","活塞环开口间隙过小","气门间隙过小","气门座烧蚀","气缸垫密封不严"]
VI是由哪三大核心所构成？
下列是双生子研究和收养研究中得到的合体之间的智商相关系数：在与家庭成员一起生活条件下，同卵双生子之间为0.86，异卵双生子为0.6，亲子之间为0.42，堂兄弟姐妹之间为0.15；在于家庭成员分离生活条件下，同卵双生子为0.72.。据你所学，是分析人格形成的因素。
Which statement about the ip classless router command is true?（） [" The ip classless command is enabled by default in recent versions of IOS."," The ip classless command should only be enabled when static routing is being used instead of a routing protocol."," The ip classless command should be enabled by the network administrator whenever RIPv1 or IGRP is being used."," The ip classless command should be enabled by the network administrator whenever OSPF, RIPv2, or EIGRP is being used."]
怎样写好入党志愿书？
