【单选题】The giraffe(长颈鹿)_______ its very long neck.
【简答题】pressure 2.pain 3.challenge Because of its long neck ,the giraffe ( 长颈鹿 )has the highest blood ______ ( 血压 ) of any animal.
【简答题】三相交流电源是三个大小相等、频率 而相位互差120°的单相交流电源按一定方式的组合。
【简答题】Ich treffe mich morgen meiner Freundin.
【单选题】The giraffe (长颈鹿)___its very long neck.