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【判断题】
已知 f 1 ( t ) =μ(t+1)- μ(t-1), f 2 ( t ) =μ(t-1)- μ(t-2), 则 f 1 ( t ) * f 2 ( t ) 的非零值区间为( 0,3)
A.
正确
B.
错误
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参考答案:
举一反三
【判断题】要尽量减少与其他家庭成员接触,必须接触时保持 1 米以上距离,尽量处于下风向。
A.
正确
B.
错误
【简答题】Part A Suppose you have done something wrong to your friend Jennifer because of misunderstanding. Now write a letter an apology to her. You should write approximately 100 words. Do not sign you...
【单选题】若空间点的两个投影在不同的投影轴上,则第三面投影必在( )
A.
第三条投影轴上
B.
某一投影面上
C.
原点
D.
不确定
【单选题】Jennifer didnt know you were here; otherwise she______to meet you.
A.
would have come
B.
had come
C.
must have come
D.
would come
【简答题】Choose the correct sentences from the following four choices. Imagine you are a friend of Jennifer. Tomorrow is your birthday. You are inviting her to come to your birthday party. You: Jennifer, 1 ___...
【单选题】You may ______ it that Jennifer will come and help us if we are in trouble.
A.
base on
B.
rely on
C.
carry on
D.
hold on
【单选题】若空间点的两个投影在不同的投影轴上,则第三面投影必在( )。
A.
原点
B.
第三条投影轴上
C.
某一投影面上
D.
不确定
【简答题】You will hear a conversation between Jennifer and Paul. Listen to the first part of the conversation and fill in the blanks with the missing sentences. Jennifer: Hi, Paul! It’s you! 1) ____________. H...
【简答题】You will hear a conversation between Jennifer and Paul. Listen to the first part of the conversation and fill in the blanks with the missing sentences. Jennifer: Hi, Paul! It’s you! 1) _______________...
【简答题】• Jennifer: Hi, Paul! It’s you! 1)________. How are you? • Paul: Very well, thank you. And you, Jennifer? • Jennifer: Not too bad. Rebecca told me you’ve got a new job. So, 2) ___________? • Paul: I’m...
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