对于函数,若存在区间,使得,则称函数为“可等域函数”,区间为函数的一个“可等域区间”.给出下列4个函数:①;②;③;④. 其中存在唯一“可等
下列函数中,既是偶函数又在单调递增的函数是( ) A . B. C. D.
已知函数的图像过点P(一1,2),且在P点处的切线恰好与直线垂直. (1)求的函数关系式; (2)若在区间[]上单调递增,求实数的取值范围.
下图是一个生态系统部分结构示意图,据图分析回答:(1)图中的太阳光、水、空气、无机盐都属于生态系统中的 成分。(2)细菌和真菌在
Pirates from Somalia who hijacked _____European carrier in ______ Indian Ocean threatened to kill its 25 crew members if any rescue operation was attempted. A. the; 不填
It’s kind Yao Beina to donate her corneas (眼角膜) three people in need. A. of; to B. for; to C. of; for D. for; for
下列病症可以用孟德尔遗传规律预测后代患病概率的是( ) A.艾滋病 B.苯丙酮尿症 C.猫叫综合征 D.先天性愚型
________ is no reason for dismissing her. A. Because she was a few minutes late B. Owing to a few minutes late C. The fact that she was a few minutes late D. Being a few minutes late