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不同牌号或用途的柴油不能进行掺兑使用,以免影响发动机正常使用。A.
正确
B.
错误
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【单选题】My car broke down last Monday without any previous(), leaving me an hour late to work.
A.
partner
B.
boost
C.
symptom
【单选题】—How come you were half an hour late for my class this morning, Mike? —________. My father's car broke down halfway.
A.
Yes, so what?
B.
No, it's not my fault.
C.
Well, who knows?
D.
Sorry, but I couldn't help it.
【单选题】A One evening last July．my old car broke down on a highway． It was an hour before sunset．and I was 25 miles from home． I couldn-t reach anyone to pick me up．so I decided to take a bus． After a while．a...
A.
take hold of and lift．．．
B.
choose．．． carefully
C.
give．．． a ride
D.
hear on learn．．．
【简答题】设总体ξ的概率密度为 其中θ(θ＞-1)是未知参数，ξ 1 ，ξ 2 ，…，ξ n 是来自总体ξ的一个容量为n的简单随机样本，试分别用矩估计法和最大似然估计法求θ的估计量．
【简答题】My car broke down an overheated engine.
【单选题】Jack, My car broke down on the motorway, so I'll be late picking you up. I'm on the way again now -- see you at your house in 30 minutes. David
A.
David is fixing his broken car on the motorway at the moment.
B.
David is half an hour away from where Jack lives.
C.
David is hoping Jack will collect him in his car soon.
【简答题】My car broke down last Monday without any previous ( ), leaving me an hour late to work.
【简答题】阅读理解。 One evening last July, my old car broke down on a highway. It was an hour before sunset, and l was 25 miles from home. I couldn't reach anyone to pick me up, so I decided to take a bus. After ...
【单选题】My car broke down last Monday without any previous_______ , leaving me an hour late to work.
A.
extremely
B.
research
C.
symptom
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