Which of the following is TRUE about relay races?___.
A. It is a team event running with the same sex.
B. A runner has four teammates in a relay race.
C. A runner can hand the baton over to his teammate before he finishes his leg.
D. Now Olympic relay has two distances: one for men, the other for women.
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If a race walker’s both feet are in the air, it is called ___.
A. flying
B. lifting
C. running
D. straightening
If the runner knocks down the hurdles during the competition, he will not be penalized.
A. 对
B. 错
Middle-distance runners take a standing position when they start the competition.
A. 对
B. 错
ECMAScript(ES)是Ecma国际发布的,ES与JavaScript的关系是。