问题
填空题
少数青少年由于沉迷于网络而过度用眼，使来自远方物体的光线聚焦在视网膜______（选填“前方”或“后方”）导致了近视，应佩戴______镜加以矫正．
答案
少数青少年由于沉迷于网络而过度用眼，使来自远方物体的光线聚焦在视网膜前方，导致近视，应佩戴凹透镜进行矫正．
故答案为：前方；凹透．
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少数青少年由于沉迷于网络而过度用眼，使来自远方物体的光线聚焦在视网膜______（选填“前方”或“后方”）导致了近视，应佩戴______镜加以矫正．
少数青少年由于沉迷于网络而过度用眼，使来自远方物体的光线聚焦在视网膜前方，导致近视，应佩戴凹透镜进行矫正．
故答案为：前方；凹透．
| 阅读理解。 | ||||
| ||||
| 1. If you want to buy a little dog, you can call ______. | ||||
| A. 555-9019 B. 555-0001 C. 555-4140 D. 555-2732 | ||||
| 2. If you tell the owner where Bluey is, you will be give ______. | ||||
| A. a gold medal B. a large pet C. a great prize D. a lot of money | ||||
| 3. Who is available to answer the call 24 hours a day? | ||||
| A. Barbara B. Tom C. Carl D. Sandy | ||||
| 4. The above four notices are all about ______. | ||||
| A. dogs B. cats C. pets D. selling pets |