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长期应用受体阻断药普萘洛尔治疗高血压，突然停药导致血压骤升，这种反跳现象是因为受体向下调节的作用。A.
正确
B.
错误
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【简答题】Some nations pride themselves on having a clear and logical language. The French, for instance, point to their language as being the clearest and most logical in the world. The Germans, similarly, ten...
【简答题】In what seems like the prehistoric times of computer history, the earth’s postwar era, there was quite a wide-spread concern that computers would take over the world from man one day. Already today, l...
【单选题】DNA 与RNA 完全水解后产物的特点是()。
A.
核糖相同、碱基小部分相同
B.
核糖不同、碱基相同
C.
核糖相同、碱基不同
D.
核糖不同、碱基不同
E.
以上都不对
【简答题】有订单表orders(oid,odate,cid), 其中oid是订单号，odate是订单日期，cid是客户编号； 订单详细信息表orderitems(oid,pid,quantity);其中pid是商品编号，quantity是数量。 查询购买商品编号为“101”商品的顾客编号及订单日期。SQL语句为（ ）A. select cid,odate from orderswhere oid in (...
【简答题】Some nations pride themselves on having a clear and logical language. The French, for instance, point to their language as being the clearest and most logical in the world. The Germans, similarly, ten...
【简答题】In what seems like the prehistoric times of computer history, the earth’s postwar era, there was quite a wide-spread concern that computers would take over the world from man one day. Already today, l...
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