在常温常压下，向10mL 0.01mol/L FeCl3溶液中滴入1mL 0.0

Electronic mail has become an extremely important and popular means of communication.
The convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of unsolicited commercial electronic mail. Unsolicited commercial electronic mail is currently estimated to account for over half of all electronic mail traffic, up from an estimated 7 percent in 2001, and the volume continues to rise. Most of these messages are fraudulent or deceptive in one or more respects.
The receipt of unsolicited commercial electronic mail may result in costs to recipients who cannot refuse to accept such mail and who incur costs for the storage of such mail, or for the time spent accessing, reviewing, and discarding such mail, or for both. The receipt of a large number of unwanted messages also decreases the convenience of electronic mail and creates a risk that wanted electronic mail messages, both commercial and noncommercial, will be lost, overlooked, or discarded amidst the larger volume of unwanted messages, thus reducing the reliability and usefulness of electronic mail to the recipient. Some commercial electronic mail contains material that many recipients may consider vulgar or pornographic in nature.
The growth in unsolicited commercial electronic mail imposes significant monetary costs on providers of Internet access services, businesses, and educational and nonprofit institutions that carry and receive such mail, as there is a finite volume of mail that such providers, businesses, and institutions can handle without further investment in infrastructure. Many senders of unsolicited commercial electronic mail purposefully disguise the source of such mail.
Many senders of unsolicited commercial electronic mail purposefully include misleading information in the messages’ subject lines in order to induce the recipients to view the messages. While some senders of commercial electronic mail messages provide simple and reliable ways for recipients to reject (or "opt-out" of) receipt of commercial electronic mail from such senders in the future, other senders provide no such "opt-out" mechanism, or refuse to honor the requests of recipients not to receive electronic mail from such senders in the future, or both.
Many senders of bulk unsolicited commercial electronic mail use computer programs to gather large numbers of electronic mail addresses on an automated basis from Internet websites or online services where users must post their addresses in order to make full use of the website or service.
The problems associated with the rapid growth and abuse of unsolicited commercial electronic mail cannot be solved by the government alone. The development and adoption of technological approaches and the pursuit of cooperative efforts with other countries will be necessary as well.

Which of the following is NOT true about unwanted e-mail

A．It costs money to receive them.

B．It’s free to store them.

C．It takes time to access them.

D．It takes time to throw them away.

麻疹的出疹先后顺序为（）

A.无一定规律

B.四肢、躯干、面部，自下而上

C.耳后、发际、额、面、颈、躯干、四肢

D.躯干、面部、四肢，由近向远

E.四肢、面部、躯干，呈向心性

下面程序的功能是将字符串s中的每个字符按升序的规则插到数组a中，字符串a已排好序。
#include＜stdio.h＞
#include＜string.h＞
void main()
char a[20]="cehiknqtw";
char s[]="fbla";
int i,k,j;
for(k=0;s[k]!=’\0’;k++)
j=0；
while(s[k]＞=a[j]＆＆a[j]!=’\0’)
j++;
for( (12) )
(13) ；
a[j]=s[k]；

puts(a);

败血症（）

A.致病菌侵入血液循环，持续存在，迅速繁殖，产生大量毒素 

B.局部化脓性病状的细菌杜子或脱落的感染血栓，间歇地进入血液循环，并在身体各处的组织或器官内，发生转移性脓肿 

C.少量致病菌侵入血液循环内，迅即被人体防御系统所清除，不引起或仅引起短暂而轻微的全身反应 

D.大量毒素进入血液循环后，引起剧烈的全身反应，致病菌目居在局部感染灶处，并不侵入血液循环 

E.败血症与脓血症同时存在

基数效用论