儿童少年的骨骼不容易骨折，容易变形，是因为（）A、骨中含有机物过多，而无机物过少 B
题型：单项选择题
问题：
儿童少年的骨骼不容易骨折，容易变形，是因为（）
A、骨中含有机物过多，而无机物过少
B、骨中含有机物过少，而无机物过多
题型：单项选择题
任务型阅读（本题有5小题，每小题l分，共5分）
请阅读下面段落， 将方框内所列A、B、C、D、E各选项与段落内容配对，使短文完整、通顺。
小题1:________ A small change in your daily routine can bring about noticeable improvements for the situation of sub-health（亚健康）. The following are simple suggestions for students to fight sub-health.
5 to 7 am: This is the best time to get up. Getting up early and having a good breakfast is the easiest way to raise your energy and fight tiredness.
小题2:________ A study shows that drinking water before work and study improves cognitive(认知的) ability. Drinking two liters of water can circulate（使循环）the levels of oxygen and minerals in the body.
小题3:________ Take your eyes off the book or screen every two hours and look into the distance. The eyes can affect brain and heart functions if overused, which can lead to a risk of sudden death.
小题4:________ Working out for one hour every day is important for students to remain healthy. Taking part in group sports is also a good way to reduce pressure.
小题5:________ Reading paper-based books is good for improving concentration. A consistent amount of information allows you to memorize more efficiently.
10 pm to 11 pm: This is the suggested bedtime.