摘要：12．A．but在此句中作介词.相当于except.此种结构中谓语的单复数应与but前的名词或代词相一致.此句意为:“整个山上除了草之外什么也没有.
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某同学探究平面镜成像时，将一块玻璃板竖直架在一把直尺的上面，再取两段等长的蜡烛A和B一前一后竖放在直尺上，点燃玻璃板前的蜡烛A，用眼睛进行观察，如图所示。在此实验中：
(1)直尺的作用是 ；
(2)两段等长的蜡烛作用是_______________；
(3)移去蜡烛B，并在其所在位置上放一光屏，则光屏上
（4）接收到蜡烛A的烛焰的像(填“能”或“不能”)．这说明平面
镜成的是 像。 查看习题详情和答案>>
(1)直尺的作用是 ；
(2)两段等长的蜡烛作用是_______________；
(3)移去蜡烛B，并在其所在位置上放一光屏，则光屏上
（4）接收到蜡烛A的烛焰的像(填“能”或“不能”)．这说明平面
镜成的是 像。 查看习题详情和答案>>
根据句意，在下列句中必要的地方加上适当的's(所有格形式)。
1. My friend name is Jeff Green. _____________________________
2. Who is Jim and Kate grandfather? ___________________________
3. There is a TV in Tina and Maria room. ________________________
4. This is Tom father Mr Green. ________________________________
5. How many people are there in Betty family? _______________________________
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2. Who is Jim and Kate grandfather? ___________________________
3. There is a TV in Tina and Maria room. ________________________
4. This is Tom father Mr Green. ________________________________
5. How many people are there in Betty family? _______________________________
听句子，在每句中填上所缺的单词，每空一词（每句读一遍）。
1. You can't take ________ in the museum.
2. He wasn't here today ________ he is ill.
3. What's the ________ of the city?
4. After a ________ breakfast, he went to school.
5. Christmas is on ________ 25th.
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2. He wasn't here today ________ he is ill.
3. What's the ________ of the city?
4. After a ________ breakfast, he went to school.
5. Christmas is on ________ 25th.