在CSM网络管理界面，在下拉View菜单中单击Topology，就可以看到( )

It was 6:00 on a Monday morning. With his books in his bag, 13-year-old James Mwangi was on his way to school, the Mcedo-Beijing school in a slum（贫民窟）in the Kenyan capital of Nairobi (肯尼亚首都内罗毕). This school was built in 2001 with the help of China, for children from poor families.

After getting to school, Mwangi went straight to his class to do his class work. It is usual that pupils in this school prepare for their lessons before the teacher comes.

To study in the school was once a dream for the poor boy. His mother made a living by washing clothes for others. Some days she took home nothing, and some days she could get about $ 3 — it was hardly enough to buy them a full meal for a day.

Before joining the Mcedo-Beijing school, Mwangi was at home with his seven brothers, collecting garbage (垃圾). The school is giving these children hope for the future by providing    a chance to get education.

“For me, education is the best gift,” said Mwangi.

任务一：根据短文内容，简要回答下列问题。

1. How old was Mwangi?

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2. Which country helped build Mwangi’s school?

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3. How did Mwangi’s mother make a living?

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任务二：把短文中划线的句子译成汉语。

4. ___________________________________________________________________________

任务三：请给短文拟一个恰当的标题。

5. ___________________________________________________________________________

生山楂长于（）

A.活血化瘀

B.消积化食

C.消食止泻

D.止血止泻

E.燥湿健脾

窦房结动作电位描述错误的是

A．无稳定的静息电位

B．自动缓慢去极化

C．0期去极化速度缓慢，由钠离子内流引起

D．复极化无明显的1期和2期平台

E．4期自动去极化是钠离子、钙离子内流引起

导流罩是为节省能源，一般可提高航速（）。

A.0.3节

B.0.6节

C.1.0节

D.1.2节