世界上琥珀的主要产地有哪些国家?我国琥珀主要产于哪里?
参考答案:波罗的海沿岸国家:俄罗斯、波兰、德国、丹麦;抚顺
There is no________ that students will listen attentively in class, if they are _____ The World Cup in South Africa at night
A.probability ; accustomed to
B.possibility ; addicted to
C.need ; drunk with
D.chance ; familiar with
降低功率因数,使供电设备的供电能力提高