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【简答题】
协议主要由( )、( )和( )三个要素组成。 OSI 模型分为( )、( )、( )、( )、( )、( )和( )七个层次。 物理层定义了( )、( )、( )和( )四个方面的内容。 数据链路层处理的数据单位称为( )。 在数据链路层中定义的地址通常称为( )或( )。 网络层所提供的服务可以分为两类:( )服务和( )服务。 传输层的功能包括( )、( )、( )、( )和( )等。
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皮皮学刷刷变学霸
举一反三
【单选题】The watermelon ______ off my bike and ______ his head. [ ]
A.
fall; bumped
B.
fell; bump
C.
fell; bumped
【单选题】Martin ______ his bike ______ accident this morning. [ ]
A.
felt off, by
B.
fell off, by
C.
fell down, by
D.
felt off, in
【简答题】Jack almost fell off the cliff, but managed to _____until help came. A. keep on B. catch on C.count on D. hang on
【单选题】The child ______ his bike and hurt himself. [ ]
A.
fall down
B.
fall off
C.
fell down
D.
fell off
【单选题】The boy the bike, and it made his parents worried. [ ]
A.
fell off
B.
fell down
C.
fell from
D.
fell
【单选题】Speaker A: Jenny fell off and hurt her right leg. Speaker B: ____
A.
I’m sorry to hear that.
B.
I’m feeling bad.
C.
I think so.
【单选题】《离骚》中有好多人物,但下列四项中有一项不是( )
A.
在诗歌中被称为灵修、荃、哲王的君主
B.
楚辞作家宋玉
C.
劝说作者的最亲近的人叫女媭
D.
为作者占卜降神的灵氛和巫咸
【简答题】One day a poor farmer was taking a bag of wheat to town. Suddenly the bag fell off his horse onto the road. He did not know what he could do about it because it was too heavy for him to lift by himsel...
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