题干

下列关于生物膜系统结构与功能的叙述中,正确的是                  (   )

A:叶绿体类囊体薄膜不属于生物膜系统

B:细胞膜上的受体是细胞间信息交流所必需的结构

C:核膜上的核孔可以让蛋白质和RNA自由进出

D:肌细胞的细胞膜上有协助葡萄糖跨膜运输的载体

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D

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    A student's life is never easy.____A lot of preparations are needed so you can be sure to go back home with a diploma and a bright future waiting for you. The following are some basic things you need to do before seizing your passport and boarding the plane.

    Knowing the country.

    You shouldn't bother researching the country's hottest tourist spots or historical places. You won't go there as a tourist, but as a student. I'll be helpful to read the most important points in their history and to read up on their culture.____You surely don't want to face legal problems, especially if you're away from home.

    Studying their language.

    Don't expect that you can graduate abroad without knowing even the basics of the language. Before leaving your home country, take online lessons to at least master some of their words and sentences.____ Doing this will also prepare you in communicating with those who can't speak English.

    ____

    Check the conversion(兑换) of your money to their local currency, set up your bank account so you can use it there, get an insurance, and find an apartment. The Internet or your intended school will be very helpful in finding an apartment and helping you understand local currency.

    Remember, you're not only carrying your own reputation but your country's reputation as well. If you act foolishly, people there might think that all of your country men are foolish as well.____

A. Packing your clothes.

B. And it is even more difficult if you have to complete your study in a foreign land.

C. That would surely be a very bad start for your study abroad program.

D. This will be useful in living and studying there.

E. Most importantly, read about their laws.

F. Going with their trends will keep it from being too obvious that you're a foreigner.

G. Preparing for other needs.