题型:职场应用 题类:单元测试 难易度:易
新
At present, about 70% of the students are not shortsighted. |
20% of the students may not have enough sleep. |
Students shouldn't spend too much time reading or doing their homework without a rest. |
Sixty percent of the students like to watch TV or use computers for a long time. |
Genetic(基因的)factors also contribute to poor eyesight. |