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【多选题】
对于电子商务发展阶段,以下说法正确的是A.
电子商务最初使用的是电子数据交换技术
B.
电子商务的第二个阶段是互联网阶段
C.
电子商务的移动互联阶段分为1G 2G 3G 4G 5G五个阶段，起始于1G即第一代移动技术。
D.
目前电子商务正处于依托于大数据，云计算，人工智能为代表的的的智慧电子商务阶段。
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【单选题】--- Why do you look so upset? --- ________, I had to take over his work.
A.
His being away
B.
He was away
C.
He had been away
D.
He being away
【简答题】阅读理解。 When I was growing up, I had an old neighbor, Dr. Gibbs. He didn't look like any doctor I'd ever known. He never invited us to play in his yard, but he was a very kind person. When Dr. Gibbs was...
【简答题】When I was a child, I had an old neighbour named Dr. Gibbs. He didn’t look like any other doctor I’ve ever known. He never 11__ at us for playing in his yard. I remembered him as a kind and _12_ perso...
【简答题】完型填空。 When I was growing up, I had an old neighbor, Dr. Gibbs. He didn't look like any 1 I 2 . He never invited us to play in his yard,but he was a very 3 person. When Dr. Gibbs wasn't saving lives, h...
【单选题】He had to do an extra job after work, for he had a big family to ___________.
A.
support
B.
look at
C.
provide
D.
observe
【简答题】When I was growing up, I had an old neighbor, Dr. Gibbs. He didn't look like any doctor I'd ever known. He never invited us to play in his yard, but he was a very kind person. When Dr. Gibbs wasn't sa...
【简答题】In the car, I secretly had a look at him through the rearview mirror (后视镜). He looked sad. “What’s the matter, honey?”“I’m nervous. I don’t know if I’ll be able to learn everything in the first grade....
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