电位滴定法测定水中氯化物时，采用滴定曲线法确定滴定终点，滴定结果如下表：则滴定终点硝

阅读理解。

     My name is Gao Ping. My English teacher is Julia. She is from England. She has two children, a son

(儿子) and a daughter (女儿). Her daughter is Betty. Her Son is Dick. Julia and her daughter are in China,

but her husband (丈夫) Paul Smith is in England. Her son is in America. Paul is a policeman. Dick is a

college (大学) student. Betty and I are in the same school. We are classmates and we are good friends. I

teach her Chinese and she teaches me English.

1. Where does Julia come from?     

     ___________________________________                               

2. What is Julia's  husband?   

    ____________________________________                                        

3. Are Gao Ping and Betty in the same school ? 

     ____________________________________                          

4. Julia and her daughter are in _________________.                        

5. Gao Ping and Betty are classmates and they are good  _________________.

观测某竖直角，盘左读数为94°12'30"，盘右读数为265°47'12"，则指标差为( )。

A．-9"

B．9"

C．-18"

D．18"

下列有关中药煎药法错误的是（）。

A、加水量一般以浸泡后水面高出饮片2-3cm

B、煎煮火候是先武后文

C、浸泡时间应为20-30分钟到1小时

D、煎煮火候是先文后武

一颗质量为10g的子弹以200m/s的速度射入放在光滑水平面上质量为2kg的木块并穿出；穿出木块时子弹的速度变为40m/s，木块速度为0.8m/s，设子弹在木块中所受的阻力不变，在此过程中子弹和木块共获得多少内能？若这些内能有30%被子弹吸收，则可以使子弹升温多少度？子弹的比热容1.3×10²J/（kg•℃）．

张贴明显的安全标志是一项重要的安全措施，炸药厂应张贴的安全标志是