筑路队要铺一条路,计划15天完工,由于天气原因,中间休息了3天,结果又用了9天才完工,休息前铺了全工程的几分之几?
1-=
He wrote a long moving poem _________ Qian Xuesen who is known as “ Father of Chinese Rocketry.”
A.in place of
B.in favor of
C.in memory of
D.in support of
读下面甲、乙两国图,回答问题。(16分)
(1)乙国的地势特点是 ,判断理由是 。(4分)
(2)与乙国比较,甲国的气温年较差和日较差有何不同?试分析其原因。(6分)
(3)试简述图中M、N两河的主要补给类型,并分析由此而造成的两河水文特征的差异。(6分)