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【单选题】
STC89C51RC单片机有几个中断源？A.
5
B.
6
C.
7
D.
8
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反馈参考答案：
举一反三
【单选题】He thought he had lost his______forever. However, he found his pillow already taken by the dog when he entered the room.
A.
beautiful yellow little dog
B.
yellow beautiful little dog
C.
little yellow beautiful dog
D.
beautiful little yellow dog
【单选题】With his eyes ______ on the family album, he thought of the fun he had when he lived with his parents.
A.
fixing
B.
fixed
C.
to be fixed
D.
being fixed
【简答题】A．He couldn't decide on a topic for his paper. B．He thought his paper was late. C．He hadn't heard from his family in a while. D．He thought the woman had been ill.
【单选题】_____ in thought, he sat at the edge of the bed, with his eyes _____ on the letter in his hand.
A.
Lost; fixing
B.
Losing; fixed
C.
Lost; fixed
D.
Losing; fixing
【单选题】________ he thought of his children, ________ he felt.
A.
The least, the happier
B.
The more; the happier
C.
The more, the happiest
D.
The most; the happier
【简答题】7O-24.66O=___O
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