【多选题】大家相熟相知,偶也交谈。谈资无非是家长里短、儿女祖孙、菜蔬酒肉。但更多的是无言的相守, 。任时光一刻一刻流逝,任岁月一寸一寸消失......
【单选题】油菜物种甲(2n=20)与乙(2n=16)通过人工授粉杂交,获得的幼胚经离体培养形成幼苗丙,用秋水仙素处理丙的顶芽形成幼苗丁,待丁开花后自交获得后代戊若干.下列叙述正确的是( )
A.
秋水仙素和低温处理植物的原理相似,都能够通过抑制纺锤体的形成而使染色体数目加倍
C.
丙到丁发生的染色体变化,决定了生物进化的方向
D.
形成戊的过程未经过地理隔离,因而戊不是新物种
【单选题】Refer to the exhibit. Assume that all router inteces are operational and correctly configured. In addition, assume that OSPF has been correctly configured on router R2. How will the default route c...
A.
Any packet destined for a network that is not directly connected to router R1 will be dropped.
B.
Any packet destined for a network that is not directly connected to router R2 will be dropped immediately.
C.
Any packet destined for a network that is not directly connected to router R2 will be dropped immediately because of the lack of a gateway on R1.
D.
The networks directly connected to router R2 will not be able to communicate with the 172.16.100.0, 172.16.100.128, and 172.16.100. subnetworks.
E.
Any packet destined for a network that is not referenced in the routing table of router R2 will be directed to R1. R1 will then send that packet back to R2 and a routing loop will occur.
【单选题】首次在淘宝网上进行个人购物的主要流程是
A.
淘宝会员注册—支付宝注册—挑选商品—网上支付——收货评价
B.
淘宝会员注册—挑选商品—支付宝注册—网上支付——收货评价
C.
淘宝会员注册—直接登录—挑选商品—网上支付—收货评价
D.
支付宝注册—直接登录—挑选商品—网上支付—收货评价
【判断题】测量的效度有表面效度、准则效度和构造效度等类型。
【单选题】根据埃里克森的理论,青年初期主要的心理社会性矛盾是