工作场所是指劳动者日常工作所在的场所
正确
暂无解析
若向量α=（1，-2,1）与β=(2，3，t)正交，则t=()
Ourteacher__________ustopractiseourspokenEnglishasoftenaspossible.
AlthoughLindatriedhardintheexam,shedid______thanherbrother.
Only5_____ofthepopulationofAmerica_____farmers.
设矩阵X满足方程