我国邮政编码前两位代表（）。（1分）

赤铜矿主要成分为Cu₂O，则铜元素的化合价是（　　）

A．1

B．+1

C．+2

D．0

人造花(瓷质、整件一次成型)

一根木杆，第一次截去了全长的，第二次截去所剩木杆的，第三次截去所剩木杆的，第四次截去所剩木杆的，这时量得所剩木杆长为6厘米。问：木杆原来的长是多少厘米（）

A．15

B．26

C．30

D．60

个体总是生活在一定的制度安排中，中国传统儒家制度安排大多是非正式的，强调行为规则的内化过程，不重视外在强制约束，具有较高的灵活性。因此( )。

A．在儒家制度安排下，个体能以自我对制度规则的理解来灵活地调整自己的行为规则

B．在儒家制度安排下，个体可以随心所欲，不受任何约束

C．在儒家制度安排下，个体能获得最大的自由

D．儒家制度具有现代性

Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an (3) from a friend who asks you to open it. This is what happens with Melissa and several other similar email (4) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (5) .

As administrators seek to block dangerous email attachments through the recognition of well-known (6) , 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 (7) access to your network.

4（）

A.virtual 

B.virus 

C.worms 

D.bacteria