【单选题】毎一吨铸铁成本(元)倚铸件废品率(%)变动的回归方程为:Y= 56+ 8X, 这意味着( )。
【简答题】For composite video, color (“chrominance") and intensity (‘luminance") signals are mixed into __________.
【单选题】根系在土壤中的水平分布范围总是大于树冠,一般为树冠冠幅的多少倍
【多选题】Which of the following involve indirect reporting of speech? (Choose more than one)
A.
She begged the child to hurry up.
B.
‘Hurry up!’, she said.
C.
She said we were to hurry up.
D.
She told us to hurry up.
【判断题】与传统商业保险相比,自保在经营管理方面具有优势。
【单选题】若在编码器中有 1000 个编码对象,则要求输出二进制代码位数至少为 _______ 位。
【简答题】卧式壳管式满液式蒸发器制冷剂( )循环,载冷剂在( )循环。