深层滤芯适用于无菌过滤的第一道预过滤；薄膜滤芯适用于无菌过滤的最后一道过滤。

Do you know Marc Yu (余俊承). He is very famous . He is only nine years old. He is a Chinese American. His mother is from Macao. He likes music very much and he has great musical talent（天赋）. He can play forty pieces of classical music now.

After hearing Mary Had a little Lamb one time at the age of three, he began playing it on the piano. Before that, he didn’t learn the piano at all. He started to take the piano lessons at the age of three. His first public performance（表演） was at the age of three , too.

Now he can play great music for people on the stage. He wants to be a famous musician like Lang Lang in the future. He likes LangLang very much. Lang Lang is his idol.

小题1:How old is Marc Yu?

A．9

B．3

C．7

D．8小题2:Where is his mother from?

A．His mother is from America

B．His mother is from Macao

C．His mother is from Tai Wang

D．His mother is from Hong Kong小题3:When did he begin to learn the piano?

A．At the age of 9

B．At the age of 5

C．At the age of 3

D．At the age of 10小题4:.How many pieces of classical music can he play now?

A．14

B．4

C．40

D．400小题5:What does Lang Lang do?

A．A pop singer

B．A rock singer

C．A musician

D．A writer

一般中、小企业实施会计电算化的合理做法是( )。

A．购买商品化会计软件

B．本单位定点开发软件

C．使用国外会计软件

D．从其他企业复制取得会计软件

高氯血症是指血清氯超过（）

A.95mmol/L

B.100mmol/L

C.105mmol/L

D.110mmol/L

E.115mmol/L

美国商人某甲和香港商人某乙签订了货物买卖合同，履行地在德国汉堡。由于发生纠纷，他们选择在北京市第一中级人民法院提起诉讼，北京市第一中级人民法院应当适用______民事诉讼法( )

A．中国内地

B．美国

C．中国香港

D．德国汉堡

确诊直肠癌最可靠的办法是

A．直肠指诊

B．便常规检查

C．大便脱落细胞学检查

D．活体组织病理学检查

E．气钡直肠造影检查