And the essay mainly touches upon the methodology in teaching the "physically poor group" in a PE class,keeping in mind the fact that the young have their special psychology,physical features and health hobbies, the fact that conventional PE teaching overstresses the training of the "top studen.

The result showed that there was significant group difference between the female taekwondo athletes and average female college students in the time span and the degree of attention blink,and there was significant sport rank deference between the elite female taekwondo athletes and ordinary female taekwondo athletes in the time .

Results showed that there exited significant group difference of the degree of attentional blink, the last time of attentional blink, the lowest point of attentional blink between primary school students grade two and grade four, especially between the two group female primary school students.

The results show that there is a significant group difference between the female soccer players and the average female P.

Analysis of morphological variations among four wild populations of Portunus trituberculatus;

Isozyme polymorphism in Portunus trituberculatus from wild population;

Genetic variations among late selected strains and wild populations of blunt snout bream (Megalobrama amblycephala) by ISSR analysis