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【单选题】
下列人类进化阶段中,属于最早的是
A.
古猿阶段
B.
南猿阶段
C.
猿人阶段
D.
阶段
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【单选题】Look at the following writing question and choose which essay structure is incorrect . Some people think that governments should spend money on railways. Others believe that there should be more inves...
A.
(1) introduction; (2) body paragraph 1; (3) body paragraph 2; (4) conclusion
B.
(1) introduction; (2) body paragraph; (3) conclusion
C.
(1) introduction; (2) body paragraph 1; (3) body paragraph 2; (4) body paragraph 3; (5) conclusion
【简答题】已知函数f(x)=x 2 +(a+1)x+lg|a+2|(a∈R,且a≠-2). (Ⅰ)若f(x)能表示成一个奇函数g(x)和一个偶函数h(x)的和,求g(x)和h(x)的解析式; (Ⅱ)命题P:函数f(x)在区间[(a+1) 2 ,+∞) 上是增函数; 命题Q:函数g(x)是减函数.如果命题P、Q有且仅有一个是真命题,求a的取值范围; (Ⅲ)在(Ⅱ)的条件下,比较f(1)和 1 6 的大小.
【简答题】短文填词。 (1)O Sundays, we like (2)g to the movies. My (3)f movies are (4)t . Some people think they're scary but I like (5)t very much. I don't like (6)d because they are boring. But some people like the...
【简答题】设a∈R,f(x)为奇函数,且 f(2x)= a? 4 x - a -2 4 x +1 (1)试求f(x)的反函数f -1 (x)的解析式及f -1 (x)的定义域; (2)设 g(x)=lo g 2 1+x k ,是否存在实数k,使得对于任意的 x∈[ 1 2 , 2 3 ] ,f -1 (x)≤g(x)恒成立,如果存在,求实数k的取值范围.如果不存在,请说明理由.
【简答题】如图,在矩形ABCD中,AB=12cm,BC=6cm.点E、 F分别在AB、CD上,将矩形ABCD沿EF折叠,使点A、 D分别落在矩形ABCD外部的点A 1 、D 1 处,则整个阴影部分图形的周长为(        )。
【简答题】已知函数 f(x)=lo g a 1-x 1+x (0<a<1) . (1)求函数f(x)的定义域D,并判断f(x)的奇偶性; (2)如果当x∈(t,a)时,f(x)的值域是(-∞,1),求a与t的值; (3)对任意的x 1 ,x 2 ∈D,是否存在x 3 ∈D,使得f(x 1 )+f(x 2 )=f(x 3 ),若存在,求出x 3 ;若不存在,请说明理由.
【判断题】行星及行星的卫星的分布是有规律的,行星与太阳的距离和规则卫星离中心行星的距离均服从提丢斯-玻德定则。
A.
正确
B.
错误
【简答题】Everybody dreams. Some people think dreams can tell us about the future. Other people think dreams tell us about ourselves. It's like our 1 is talking to us. Why are dreams often strange and hard to u...
【简答题】Everybody dreams. Some people think dreams can tell us about the future. Other people think dreams tell us about ourselves. It’s like our 1 is talking to us. Why are dreams 2 strange and hard to...
【简答题】已知:如图,矩形ABCD中AB:BC=5:6,点E在BC上,点F在CD上,EC= 1 6 BC,FC= 3 5 CD,FG⊥AE与G.求证:AG=4GE.
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