标志着我国漫长的原始社会结束，奴隶社会开始的事件是 [ ] A．禹建立夏朝 B．

下图是“世界部分地区示意图”。读图完成下列各题。

(1)②地所属的自然带是__________，此自然带在澳大利亚分布较广，并一直延伸到大陆西岸。其原因是____________________________。

(2)图中④所属的自然带是____________、⑤所属的自然带是____________，①～④～⑤自然带的变化体现了自然带____________的地域分异规律，影响因素是_______________，③～②自然带的更替主要受____________因素影响。

(3)下图是“①地所在经线附近某山峰垂直自然带分布示意图”，图中A、B、C所代表的自然带。A______________，B______________，C______________。

起自耻骨下支，止于胫骨粗隆内下方的肌是（）

A.股薄肌

B.长收肌

C.短收肌

D.大收肌

E.股二头肌

Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an (26) from a friend who asks you to open it. This is what happens with Melissa and several other similar email (27) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (28) .
As administrators seek to block dangerous email attachments through the recognition of well-known (29) , virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.
Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the (30) access to your network.

A．cracker

B．user

C．customer

D．client

自诉人赵某控告被告人薛某犯诽谤罪，在诉讼过程中，薛某提出证据，控告赵某把他打成重伤。人民法院对薛某的控告应如何处理( )

A．应作为反诉并案处
B．转交公安机关立案
C．应另案处理
D．转交检察机关立案

练习柔道者以不同的腰带颜色区分其级别的不同，请问黑色代表什么级别？（）

A.初学者

B.1，2，3级

C.初级-5段

D.6-8段