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【单选题】
: ;乙: ,则( )A.
甲是乙的充要条件
B.
甲是乙的充分条件但不是乙的必要条件
C.
甲是乙的必要条件但不是乙的充分条件
D.
甲既不是乙的充分条件也不是乙的必要条
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举一反三
【单选题】—Jack hurt his arms while playing basketball yesterday afternoon. —________. [ ]
A.
Never mind
B.
That's all right
C.
That's nothing
D.
I'm sorry to hear that
【单选题】In the hospital,____________.
A.
the doctor tells Jack that he is seriously ill
B.
Jack tells the doctor that he is running a high fever
C.
the doctor wants to see if Jack’s lungs are all right
D.
Jack tells the doctor that he’s hurt his body badly
【单选题】Jack hurt his leg yesterday. Now he is in the hospital. ____________
A.
It’s my pleasure.
B.
All right.
C.
I’m sorry to hear that.
【简答题】实时系统与分时及批处理系统的主要区别是()性和()性。
【简答题】五、词汇运用 （一）根据汉语或首字母提示用所学单词的正确形式完成下列句子。（每小题1分，共10分） 1. The manager said to the worker, “Get to work or ______________ (辞职) right now.” 2. The professor instructed his students to ______________ (服从) the...
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