一个数列从左边第一个不是零的数字算起，直到最末一位数字为止的所有数字，称为（）
A、有效数字
B、有效位数
C、有效数列
D、数字计数
参考答案：A
按要求改写句子，每空一词,包括缩略词。
1. More people will see the next Olympic Games. (改为被动句)
The next Olympic Games will _____ _____ by more people.
2. Zhang Yining was helped by her coach. (就画线部分提问)
_____ _____ Zhang Yining helped by?
3. Nobody took the yearbooks out of the reading room. (改为同义句)
The yearbooks _____ _____ out of the reading room.
4. Are you going on spending your vacation in London? (同上)
Are you going to_____ _____ your vacation in London?
5. Yao Ming and Liu Xiang are famous all over the world. (同上)
Yao Ming and Liu Xiang are_____ _____ all over the world.
同化作用
