简述急性化脓性根尖周炎。

下图是甲病和乙病遗传的家族系谱图(已知Ⅰ₃)。其中甲病受A、a基因控制；乙病受B、b基因控制。请据图回答：

(1)控制甲病的基因位于________染色体上，控制乙病的致病基因位于_______染色体上。乙病在人群中男患者________(多于、少于、等于)女患者。

(2)IV₁₃________。两病都患的概率是____________。

(3)若一个基因型为DdX^eY的个体体细胞染色体及基因表达格式如下图所示，请在右侧方框中画出Ⅱ8，并标注涉及的基因。(图形与标注基因完全正确才得分)

(4)基因的自由组合定律体现在下图数字________对应的时期。

阅读理解。

     Mike is an American school boy. He is now in Beijing with his parents. He doesn't know Chinese, but he

is trying (努力) to study and speak it. He often tries to speak Chinese to his Chinese friends. Sometimes

they don't understand (理解) him, because he can't speak Chinese well.　

      One Saturday morning, Mike goes out. He is on his way to the park. He is going there to see a flower

show (展览). But he doesn't know how to get there. He asks a Chinese boy. The boy can't understand him.

Then he takes out a pen and some paper. He draws flowers on it, gives the picture to the boy and says

something about it. The boy smiles and then shows (指给) Mike the way to the park.　

1. Where does Mike live now? He lives in _____.　　　　　 [ ]

A. America 　

B. England　　　

C. China 　　　

2. He can speak _____ Chinese.　　　　 [ ]

A. much　　　　

B. a little　　　

C. little 　　　　　

3. He likes _____ Chinese with his _____.　　　　　 [ ]

A. speak, parents 　

B. speaking, friends

C. speaking, teachers

4. Where is he going?　　　　　 　 　　　　　　 　[ ]

A. To a new school. 　

B. To see some flowers.　

C. To a park.

5. How does he ask the way to the flower show?　　　　　[ ]

A. He asks the way in Chinese.

B. He asks the way with a sigh (标志).　　　　

C. He draws a picture to ask the way.

在VBA代码调试过程中，能够显示出所有在当前过程中变量声明及变量值信息的是 ______。

A．快速监视窗口

B．监视窗口

C．立即窗口

D．本地窗口

下列属于非生产性建设项目的是（）。

A．工业厂房

B．居住建筑

C．邮电大楼

D．大型百货商场

城市经济学的核心理论是( )。

A．城市化和城市经济增长理论
B．城市公共经济理论
C．城市内部空间结构理论
D．城市市场经济理论