题型:填空题 Believe it or not, there is ______ as standard English.A.no such a thingB.no such thingC.not such thingD.no a such thing 查看答案
题型:填空题 (12分)小船在200m宽的河中横渡,水流速度是2m/s,船在静水中的航速是4m/s,试求:⑴ 当小船的船头始终正对河岸时,它将在何时、何处到达对岸?⑵ 要使小船到达正对岸,应如何航行?用时多少? 查看答案