GB8408-2008《游乐设施安全规范》规定,游乐设施起动前应设必要的音响等信号装置
正确
暂无解析
计算行列式=()
TheshoesaremadeinWuxiCity,______isfamousforit'sproductsoflightindustry.
Americaisan__________country.Youcanhear__________everywhere.
设α,则A=ααT的非零特征值是_______________
Thereareoversix________students_____partintheentranceexaminDongchengonMaythesecond.