闭气试验具有与闭水试验相当的效果,其优越性是能够避免湿操作,并节约大量试验用水。
正确
暂无解析
Scientistsdoubtwhetherit’s________toregulateone’sbiologicalclockbydrinking.
名词解释:abilloflading
Evenwiththenewdevelopmentinresearch,onlyatiny________ofalltestsaredonewithoutusinganimals.
Themoneywouldhavetoberaisedby________taxation.
Whichofthefollowingisnotaninternationalvisitor?