A:Li2NH中N的化合价是-1
B:此法储氢和钢瓶储氢的原理相同
C:Li+和H—的离子半径相等
D:该反应中H2既是氧化剂又是还原剂
有甲、乙、丙、丁四个轻质小球,乙带正电,把四个小球分别两两靠近时,发现乙吸引甲,丙吸引乙,丁吸引丙也吸引甲,则甲球( )
选择句子的翻译。
①请问、去超市怎么走?____ A. Nice to meet you.
②一直向前走,然后向右转____ B. Go straight on, then turn right.
③小明在学校附近。____ C.Excuse me. Where is the supermarket?
④见到你真高兴。____ D. Xiaoming is near the school.