This article summarizes expertise gleaned from the first years of Internet-based experimental research and
presents recommendations on: (1) ideal circumstances for conducting a study on the Internet; (2) what precautions have to
be undertaken in Web experimental design; (3) which techniques have proven useful in Web experimenting; (4) which
frequent errors and misconceptions need to be avoided; and (5) what should be reported. Procedures and solutions for
typical challenges in Web experimenting are discussed.
A pandemic is a global disease outbreak. A flu pa
demic occurs when a new influenza virus emerge
for which people have little or no immunity, and f
which there is no vaccine. The disease spreads ea
ily person-to-person, causes serious illness, and
can sweep across the country and around the
world in a very short time.
It is difficult to predict when the next influenza
pandemic will occur or how severe it will be.
Wherever and whenever a pandemic starts, every
one around the world is at risk.
Unit 3: At home.
Period 17: Lesson 4: Read
I. Objectives: - After the lesson, Ss will be able to understand the safety precautions in the house and practice using Why - because.
III. Teaching procedure:
2. Oral test: - Homework correction.
3. New lesson:
A. Warm- up: Brainstorming:
Danger in the home for children
Boiling water knife
* Pre- reading:
- Teach some new words:
+ Checking: Slap the board.
Once sustained human infection is documented, early in a pandemic, especially before a vaccine is available or
during a period of limited supply, HHS may implement travel-related and community-based public health
strategies in order to impede the spread of the virus and reduce the number of people infected.