文件制成相对时间检验的一般方法有（）。A.色料与纸张结合的牢固程度 B.纸张的颜色

垃圾分类有利于资源的回收、利用及环境保护，下列垃圾分类错误的是（　　）

选项	A	B	C	D
垃圾	废旧塑料瓶	废易拉罐	废荧光灯管	枯枝落叶
垃圾 分类	可回收物	其他垃圾	有害垃圾	可堆肥垃圾

A．A

B．B

C．C

D．D

能够统一天下的秦始皇，造了一个举世闻名的长城去防御敌人，可就是没想到制造导弹去攻击敌人。从哲学的角度看，这是因为实践具有     的特点

A．自觉选择性

B．主观能动性

C．目的性和计划性

D．社会历史性

女，38岁，已婚，农村妇女，2年来常感下腹部隐痛不适，12小时前突起转移性右下腹痛，伴恶心、呕吐、发热，查右下腹明显压痛、反跳痛、肌紧张。血常规：WBC16×10⁹/L，N0.88。尿常规无特殊异常。

患者此次发病与盆腔炎鉴别最可靠的临床表现为（）

A.2年来下腹部常常隐痛不适

B.恶心、呕吐、发热

C.转移性右下腹痛及右下腹明显压痛、反跳痛

D.血常规和尿常规检查

E.月经生育史

假定有以下两个过程：
Sub S1(By Val x As Integer，By Val y As Integer)
Dim t As Integer
t=x
x=y
y=t
End Sub
Sub S2(x As Integer，y As Integer)
Dim t As Integer
t=x
x=y
y=t
End Sub
则以下说法中正确的是 ______。

A．用过程S1可以实现交换两个变量的值的操作，S2不能实现

B．用过程S2可以实现交换两个变量的值的操作，S1不能实现

C．用过程S1和S2都可以实现交换两个变量的值的操作

D．用过程S1和S2都不能实现交换两个变量的值的操作

Melissa and LoveLetter made use of the trust that exists between friends orcolleagues．Imagine receiving an (71) from a friend who asks you to open it．This is whathappens with Melissa and several other similar email (72) ．Upon running，such wormsusually proceed to send themselves out to email addresses from the victim’s address book，previous emails，web pages (73) ．

A．memory B．caches C．ports D．registers

As administrators seek to block dangerous email attachments through the recognition ofwell—known (74) ，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 wilt still runand 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，simultaneouslyruns commands in the background to steal your passwords and give the (75) access to yournetwork．
供选择答案：