【单选题】不等式组 2+x≤3 -x≤3 的解集是( )
【单选题】We need to establish a legal ______ for the protection of the environment.
【判断题】To establish the asymptotic normality of the OLS estimator【图片】 in Chapter 5, we need to apply the CLT for i.i.d random samples.
【判断题】稳固性、能产性、全民常用性是一般词汇的基本特点。
【多选题】What do we need to establish a career in modern life according to the text