A:a
B:1/a
C:1
D:1-1/a
(A) 根据句意,在答题卡标有题号的横线上,写出括号内所给单词的适当形式。____ It was raining ____________ (heavy) at this time yesterday.____ Our headmaster is the (strict) with us among the teachers who teach us.____ They looked at our pictures, but they didn't show us ___________ (they).____ Our English teacher has offered us some useful _______________ (suggest). I think they will help us a lot in our English study.
我国是一个多山的国家,山脉纵横交错,高原、平原、盆地、丘陵镶嵌其中,构成一幅幅美丽的画卷。如图山脉间的地形区名称是( )
伊斯兰教由穆罕穆德创立,纪元开始于公元622 年。在世界范围内不断地发展着,成为21世纪世界的三大宗教之一。其主要教义集录在( )
亚洲地广人多,下列国家和地区中人口不超过1亿的一个是( )
设函数y=f(x)在(-∞,+∞)内有定义,对于给定的正数k,定义函数:fkx=f(x),(f(x)≤k)k,(f(x)>k),取函数f(x)=2-x-e-x,若对任意的x∈(-∞,+ ∞),恒有fk(x)=f(x),则( )