下列地球能源属于地质时期储存的太阳能的是
①煤炭②地热③石油④水能[ ]
A．①②
B．①③
C．③④
D．②④
答案：B
Usually we get ________ about something and end up _________ in Chinese.
A．exciting; speaking
B．exciting; speak
C．excited; speaking
D．excited; speak
与Winsows系统不一样的是UNIS/Linux操作系统中不存在预置帐号。（）
