【单选题】Excuse me, can you tell me_____? [ ]
A.
why was the train .late
B.
why the train was late
【单选题】I wondered _____ they always looked down upon me.
【多选题】A群链球菌感染,引起超敏反应性疾病的物质是
【单选题】乙公司向甲公司购买材料一批。乙公司在付款时发现,发票的正确金额应该是5000元,甲公司却误填为50000元。正确的做法是( )。
【单选题】A群链球菌感染,引起超敏反应性疾病的物质是
【单选题】-- Why? Where is the key to the meeting room? -- Dear me! You ______ it in the taxi! [ ]
【单选题】板件的宽厚比加大,其临界应力的大小______。