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该图为视网膜的结构示意图，请标出序号所指部位的名称并回答问题。 ①视网膜中具有几百万到几亿个感觉细胞，感光细胞分为_______和_________两大类。 _______感知强光和颜色，________对弱光非常敏感。 ②视网膜最外层是________，对感觉细胞具营养和保护作用。③视网膜通过5层神经元接收和处理视觉信息，这5层神经元包括________、________、________、________和_______。光线通过这透明的5层细胞后被视网膜后部的_________________和________所吸收，转换成视觉信息后，再通过以上几层神经元细胞的加工处理，最后由________通过视神经将神经冲动传递到大脑。
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【判断题】Generally a mouse has three buttons left and right to perform different functions and a small wheel between the two mouse buttons.
A.
正确
B.
错误
【简答题】填空。 1. This is a ________ mouse. That's a ________ elephant. (small, big) 2. Tom's is ________. Mary's is ________. (new, old) 3. The rabbit (兔子) has very ________ ears. The cat has very ________ ears...
【简答题】用所给词的适当形式填空。 1.There are two small ______(mouse) in that box. 2. The beautiful car is the famous __ (sing). 3. I know how to cook ___ (taste) meals. 4. He teaches ___ (he) Japanese this term. 5. They ...
【简答题】Mickey Mouse is an interesting ca_______, and a lot of small children love watehing it.
【简答题】___________The little mouse in the story was small and (not physically strong), but very clever.
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