【判断题】图示运放电路的输出电压 u o 可以表示为如下关系:
【单选题】Because of the mad cow disease, the European Union ______ a worldwide ban on British beef and beef product exports.
【单选题】Because of the mad cow disease, The European Union _______ a worldwide ban on British beef and beef product exports.
【单选题】Linda's teacher was so mad _____ her because she made lots of mistakes in the test. [ ]