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【单选题】
OLS估计量是通过()推导的:A.
将对应Xi的最小值的Yi与对应Xi的最大值的Yi相连
B.
最小化残差之和
C.
最小化残差绝对值之和
D.
最小化残差的平方之和
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反馈参考答案：
举一反三
【单选题】Ten members were present at the meeting, _____________ myself.
A.
including
B.
containing
C.
included
D.
contained
【单选题】What is a train?
A.
A train is carrying people or goods from one place to another.
B.
A train use freight cars to transport goods or cargo.
C.
A train is passenger-carrying vehicles that can often be very long and fast.
D.
A train is a form of rail transportation consisting of a series of vehicles that usually runs along a rail track to transport cargo or passengers
【单选题】_____ myself, ten members were present at the meeting.
A.
Including
B.
By
C.
For
D.
except
【单选题】听力原文：The snowstorm brought train travel to a standstill. What happened to train travel?
A.
Trains were stuck in the snow.
B.
People couldn't get train tickets.
C.
Many people had to stand on the train.
D.
Train travel was suspended because of severe snowstorm.
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