【单选题】Can you buy me the same T-shirt_______ you gave Lily yesterday?
【单选题】X: You look pretty in this dress. Where did you buy it? Y: My daughter gave it to me as a gift for Mother's Day. Question: What can be inferred from the conversation?
A.
X likes the dress very much.
C.
X didn’t receive any gift for Mother’s Day.
D.
X doesn’t have a daughter.
【多选题】下列填票方式中,哪些是在电气设备上工作的工作票填用方式。( )
【多选题】下列哪些工作,应填用带电作业工作票? ( )
【单选题】I can give you, ______, $ 5,000 to buy this old-fashioned Cadillac. What do you think?
【多选题】下列哪些工作,应填用带电作业工作票?()
【简答题】what ’ s the most important thing to know about if I want to exhibit at a trade fair? a. As an exhibitor, choosing the ____trade fair is essential. b. If the trade fair is too_____ or too______ , it ’...
【简答题】96% of all shopping transactions go 1 .But what protection do you have as a consumer from an 2 seller? If you buy 3 goods you have the right to return them to the seller within seven days and get a fu...
【简答题】Student money forum Follow our tips to help you make the most of your finances in the year ahead. Course materials Try to borrow books at the library. You can also buy second-hand ones , as older stud...
【多选题】下列选项中判断正确的有()。
A.
在严重多重共线性下,OLS估计量仍是最佳线性无偏估计量。
B.
多重共线性问题的实质是样本现象,因此可以通过增加样本信息得到改善。
C.
虽然多重共线性下,很难精确区分各个解释变量的单独影响,但可据此模型进行预测。
D.
如果回归模型存在严重的多重共线性,可不加分析地去掉某个解释变量从而消除多重共线性。