保留入学资格的学生应当在（）个工作日内，到学校招生工作部门办理相关手续并离校治疗。A

颅内生理性钙化有哪几种？各有何X线表现？

某实验小组做“探究求合力的方法”实验，如图，将橡皮条的一端固定在A点，先用两个弹簧秤互成角度地拉细绳，使细绳和橡皮条的结点到达O点，两个弹簧秤的度数分别为F₁=1.20N、F₂=2.40N，记下此时F₁和F₂这两个力所拉细绳上的一点分别为P和Q，然后只用一个弹簧秤拉橡皮条，使结点重新到达O点，弹簧秤的读数为F=3.00N，记下此时力F所拉牺牲上的一点为N．请你接着完成下列实验过程：

（1）在图中作出F₁、F₂和F这三个力的图示．

（2）用虚线把力F的箭头端分别与F1和F2的箭头端连接，得到的图形是______．

以下疾病，哪些是耳部MRI检查的首选适应证()

A．先天性外耳畸形

B．外伤

C．听神经瘤

D．颈静脉球瘤

E．胆脂瘤

B

Waste can be seen everywhere in the school. Some students ask for more food than they can eat and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don’t agree with them.
Waste can bring a lot of problems. Although China is rich in some resources (资源), we are short of(缺乏) others, for example, fresh water(淡水). It is reported that we will have no coal (煤) or oil to use in 100 years. So if we go on wasting our resources, what can we use in the future and where can we move Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.
In our everyday life, we can do many things to prevent waste from happening, for example, turn off the water taps (水龙头) when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will he changed. Waste can be stopped one day, if we do our best.

Which of the following is right ( )

A．Waste brings problems.

B．Waste can bring no problem.

C．China is rich in fresh water.

D．Students never waste things.

参苏饮与败毒散的组成中均不含有的药物是（）

A.柴胡、前胡

B.羌活、紫苏叶

C.茯苓、半夏

D.黄芪、枳实

E.人参、甘草