单项选择题：心肌组织中传导速度最慢的部位是（）。A．窦房结 B．心房 C．房室交界区 D．浦肯野

题型：完形填空

Which university would you like to go to in the future? It’s not too early to think about it right now.

Students at Hilltop School had a University Week at the end of last month. 小题1: For instance, they designed a flag for a virtual(虚拟的)“University of Hilltop”.

小题2: He said he started the program to help students form their aims. “University may not be for everyone, but we want the program to help students form their aims.” he said.

小题3: Eric, a student in Grade 8, said, “University Week made me realize that university is only four years away. I should do some research about where I want to go.” Paul, another student in Grade 8, said he realized that there so many universities for him to choose. 小题4:

The school also invited people to give career（职业）talks. The first talk was given by Captain Brown, a policeman. He talked about how to choose a career way.小题5:

“The program opened up the students’ eyes,” said Mr. Miller.

A. According to the students, the program worked well.

B. He also talked about the importance of math, reading, and writing in his career as a policeman.

C. During the week, they took part in all kinds of activities.

D. Mr. Miller is the teacher who started the program.

E. Eric thinks it’s too early to think about which university to go to in the future now.

F. After some research, he said he wanted to choose the University of California.

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题型：选择题

如图所示，a、b是在圆轨道上运行的两颗人造地球卫星，下列关于这两颗卫星相关物理量的判断中正确的是（）

A．b的线速度比较大

B．a的角速度比较大

C．a的周期比较大

D．a受到的向心力比较大

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题型：判断题

蓝色和黄色的托帕石均由人工辐照处理形成的。

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题型：单项选择题

石家庄某外贸公司从日本进口一批鲜活类货物通关时，因涉嫌走私被海关扣留，在此期间货物发生变质，对此损失应以下列哪种方式处理( )

A．因货物变质与收货人或其代理人涉嫌走私有关，故该损失由双方各承担50%

B．货物变质与海关扣留货物有关，故该损失全部由海关承担

C．货物损失是在海关正常工作程序所需时间内发生，海关不予赔偿

D．如果构成走私，损失由收货人或其代理人自负；未构成走私，损失由海关负责赔偿

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题型：单项选择题

能源可分为一次能源和二次能源，（）为一次能源。

A．电

B．焦碳

C．煤

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心肌组织中传导速度最慢的部位是（）。A．窦房结 B．心房 C．房室交界区 D．浦肯野

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