【简答题】给出下列命题: ①不等式 成立的充要条件是 ; ②已知函数 在 处连续,则 ; ③当 时,不等式 恒成立,则实数 的取值范围是 ; ④将函数 的图象按向量 平移后,与函数 的图象重合,则 的最小 值为 . 你认为正确的命题是 .(写出所有正确命题的序号)
【单选题】要使函数 在点x= -1处连续,则对f(x)可以补充的一个条件是
【单选题】His health ____ rapidly while he was in prison.
【简答题】I. 完形填空 ( 核心素养 : 文化意识 )( 建议用时 20' ) D.H.Lawrence ( 1885 — 1930 ) was an English novelist and poet.He was born in Nottinghamshire , the 1 of a coal miner.His mother was a schoolteacher.The difference i...
【简答题】He often sat in a small bar drinking considerably more than ________. a. was good for his health b. his health was good c. his good health d. was in good healt...
【单选题】函数f(x)在点x0处连续的充要条件是当x趋近于x0时()
【判断题】基础保护层的厚度最少为40mm。 ( )