【简答题】截至目前,知网收录系统 中,关于“电工技术”类的核心期刊 共有( )种。
【判断题】反硝化反应是指在有氧参与的条件下,反硝化菌将硝酸盐氮(NO3-)和亚硝酸盐氮.(NO2-)还原为氮气的过程。
【判断题】根据茶叶品质审评结果的判定原则,任一品质因子评为 —3分应为不合格。
【单选题】根据茶叶品质审评结果的判定原则,任一品质因子评为( )分为不合格。
【单选题】According to James' writings, why do the Americans move to Europe?
A.
Because Europe is more promising than America.
B.
Because too many Europeans moved to the States.
C.
Because Europe promised to give them more land.
D.
Because Europe gives a big opening to realize their dreams.
【判断题】根据茶叶品质审评结果的判定原则,任一品质因子评为-3分应为不合格。