问题
单项选择题
靶细胞上能与HIV表面gP120结合的特殊受体是（）
A.CD3分子
B.CD4分子
C.CD8分子
D.CD19分子
E.CD25分子
答案
参考答案：B
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靶细胞上能与HIV表面gP120结合的特殊受体是（）
A.CD3分子
B.CD4分子
C.CD8分子
D.CD19分子
E.CD25分子
参考答案：B
Get Yourself Lost Travelers to new cities are often told to start their trip with a bus tour. The thinking is that they can then ____1____ to the places that interested them. Nonsense! What you see from the____2____ of a moving bus is unreal and completely removed from the authentic sights, sounds and ____3____ outside. Be adventurous! The best way to experience any place is ____4____ and with absolutely no travel ____5____. Simply go wherever your feet and your ____6____ lead you. You eventually will get to the same sites that are on the bus tour - the museums, the monuments city hall- but will have ____7____ much more. You will have felt the contemporary life of the city. “But what if I get lost?” People might ask. No one gets ____8____ lost in a major city. Eventually, you can find your way back to a well-known location. If it frightens you to be “lost”, just find a taxi and go back to where you____9____. However, the nicest things can happen if you get lost. You stop at a sidewalk café to ____10____ and relax. You ask instructions of the local people at the ____11____ table. And even if they don’t speak your language, your trip becomes more ____12____ because of the experience. So next time you see a poster advertising an introductory bus tour, ____13____ your money. Instead, wander on your own. I ____15____ you a time you’ll remember with great pleasure.
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