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【单选题】
根据材料,回答题。 Stop Spam When I first got an e-mail account ten years ago, I received communications only from family, friends, and colleagues._________(46) If we want e-mail to continue to be useful, we need specific laws that make spamming(发送垃圾邮件) a crime. If lawmakers do not do something soon to prohibit spare, the problem will certainly get much worse. _________ (47) As more and more advertisers turn to spam to sell their products, individual e-mail boxes are often flooded with spam e-mails. Would people continue to use e-mail if they had to deal with an annoying amount of spare each time? _________.(48) Many spare e-mails contain computer viruses that can shut down the entire network of a company. Companies rely on e-mail for their employees to communicate with each other. Spare frequently causes failures in their local communications networks. _________ (49)Such a situation results in a loss of productivity and requires companies to repeatedly repair their nOt works. These computer problems raise production costs of companies, which are, in the end, passes on to the consumer. For these reasons, I believe that lawmakers need to legislate (立法) against spam. _________ (50) E-mail is a tool which helps people all over the world to communicate, but spam is destroying this convenience. 回答(46)题 查看材料
A.
Computer programs allow spammers to send hundreds of millions of e-mails almost instantly。
B.
This question is troubling for individuals and companies as well.
C.
But now it seems that every time I check my e-mail, I have an endless series of adver-tisements and other correspondence that do not interest me at all.
D.
Spammers should be fined, and perhaps Sent to prison if they continue to disturb people.
E.
And their employees are thus unable to communicate effectively.
F.
Spamming is more serious in China than in America.
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【单选题】生用活血通经,利水通淋,引血下行,制用补肝肾,强筋骨的药物是( )
A.
五灵脂
B.
牛膝
C.
骨碎补
D.
丹参
E.
鸡血藤
【判断题】间接式轮胎压力监测系统是利用安装在每一个轮胎里的压力传感器来直接测量轮胎的气压,并对各轮胎气压进行显示及监控,当轮胎气压太低或轮胎漏气时,系统会自动报警。
A.
正确
B.
错误
【简答题】烷烃的分子通式是____,含有12个氢原子的烷烃分子中有____个碳原子。
【多选题】运算符重载和类型转换函数的区别有( )
A.
类型转换函数有返回值类型, 运算符重载没有返回值类型
B.
类型转换函数没有参数, 运算符重载可以有参数
C.
类型转换函数只能定义为一个类的成员函数
D.
类型转换函数和运算符重载都是用operator关键字
【简答题】烷烃的分子通式是____,含有12个氢原子的烷烃分子中有____个碳原子。
【单选题】对于背景透明,( )格式做的更加彻底,它直接可以做出不规则形状的图形、图像文件。
A.
jpg
B.
png
C.
bmp
D.
tga
【简答题】烷烃的分子通式是 ,含有 12个氢原子的烷烃分子中有 个碳原子。
【多选题】下面关于自定义类的运算符重载的说法中,正确的是( )。
A.
除了后增后减单目运算符外,其他运算符重载为类的成员函数时,函数参数个数比运算符实际操作数个数少一个
B.
运算符重载为类的成员函数时,函数中的this指针指向第一个运算数
C.
只有运算符的第一个运算数是自定义类类型时,才能将该运算符重载为类的成员函数
D.
所有运算符都可以以类成员函数形式进行重载
【判断题】间接式胎压监测系统利用安装在每一个轮胎里的压力传感器来直接测量轮胎的气压,利用无线电发射器将压力信息从轮胎内部发送到射频接收器系统,然后仪表会显示轮胎气压数据或者直接使用报警指示灯。
A.
正确
B.
错误
【简答题】(1)某烷烃含有200个氢原子,其分子式是______; (2)某烃0.1mol在氧气中恰好完全燃烧,将生成物先通过足量浓硫酸,浓硫酸增重12.6g,剩余气体在标准状况下体积为13.44L.该烃的结构有多种,试写出其中两种的结构简式______、______; (3)标准状况下,将1.12LCH 4 和C 2 H 4 的混合气体通入足量溴水中,溴水增重0.28g,则乙烯占混合气体的体积百分数为__...
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