在网上特约商户开通后（）内，注册行应将商户申请表逐级上报总行备案。E、三个工作日 F

把一个大等腰三角形分割成两个完全一样的小三角形，则每个小三角形的内角和是（　　）度。 A．45 B．90 C．180 D．360

下表中列出了一些物质的熔点和沸点（1标准大气圧下），根据表中数据回答下列问题：

物质	熔点（℃）	沸点（℃）
水	0	100
萘	80	210
水银	-39	357
酒精	-117	78
氮	-210	-196
氧	-268	-183

（1）表中所列物质在常温下属于固态的是________；氧在-145℃时所处的状态是______

（2）要探究萘的熔化和沸腾过程中温度的变化，应选_______作温度计的测量物质。

（3）如果在1标准大气压下用降温的办法从空气中提取氧和氮，那么温度下降时首先液化被分离出来的是                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  （4）1标准大气圧下，当温度为0℃时，水的状态（  ）

A．一定是固态    　       B．一定是液态    　 

C．一定是固液共存态      　D．以上三种状态都有可能

下述关于梅毒的叙述哪项是正确的

A．均为性传播

B．树胶肿内可见大量类上皮细胞

C．树胶肿和血管炎是主要病变

D．可导致主动脉狭窄

在技术经济分析中应处理好哪些关系？

多级保护场合，为满足选择性要求，上一级熔断器的（）一般应大于下一级的3倍。

A、熔断时间

B、容量

C、电流