为该病人进行液体疗法，应首先选用的液体是A．5%葡萄糖液 B．生理盐水 C．10%葡

Acting is such an over-crowded profession that the only advice that should be given to a young person thinking of going on the stage is "Don’’t!". But it is useless to try to discourage someone who feels that he must act, though the chances of his becoming famous are slim. The normal way to begin is to go to a drama school. Usually only students who show promise and talent are accepted, and the course lasts two years. Then the young actor or actress takes up work with a repertory company, usually as an assistant stage manager. This means doing everything that there is to do in the theatre: painting scenery, looking after the furniture, taking care of the costumes, and even acting in very small parts. It is very hard work indeed. The hours are long and the salary is tiny. But young actors with the stage in their blood are happy, waiting for the chances of working with a better company, or perhaps in films or television.Of course, some people have unusual chances which lead to fame and success without this long and dull training. Connie Pratt, for example, was just an ordinary girl working in a bicycle factory. A film producer happened to catch sight of her one morning waiting at a bus stop, as he drove past in his big car. He told the driver to stop, and he got out to speak to the girl. He asked her if she would like to go to the film studio to do a test, and at first she thought he was joking. Then she got angry and said she would call the police. It took the producer twenty minutes to tell Connie that he was serious. Then an appointment was made for her to go to the studio the next day. The test was successful. They gave her some necessary lessons and within a few weeks she was playing the leading part opposite one of the most famous actors of the day. Of course, she was given a more dramatic name, which is now world-famous. But chances like this happen once in a blue moon!

According to the passage, the main, reason why young people should be discouraged from becoming actors is________.

A．actors are very unusual people

B．the course at the drama school lasts two years

C．acting is really a hard job

D．there are already too many actors

对于女童来说，下列膳食配比合理的是（）

A.蛋白质供给占总热量的12%～15%，脂肪占25%～30%，糖类占50%～60%

B.蛋白质、脂肪和糖类供给各占总热量的1／3

C.蛋白质供给占总热量的16%～20%，脂肪占20%～30%，糖类占50%～60%

D.蛋白质供给占总热量的16%～18%，脂肪占20%～30%，糖类占50%～60%

E.蛋白质供给占总热量的12%～15%，脂肪占20%～30%，糖类占50%～60%

以下关于痣细胞痣临床表现的描述正确的有（）

A.可发生于任何年龄和部位

B.扁平损害多为混合痣

C.皮损上可有毛发

D.可呈各种颜色

女性，24岁，误服敌敌畏10ml半小时后昏迷来院，诊断急性有机磷中毒。下列哪一项属烟碱样症状（）。

A.多汗

B.肌纤维束颤动

C.瞳孔缩小

D.流涎

E.肺水肿

根据《工程建设工法管理办法》，工法分为房屋建筑工程、土木工程和（）三个类别。

A、机电安装工程

B、建筑电气工程

C、通风与空调工程

D、工业安装工程