对于苷类物质描述说法错误的是（） A.存在于植物体的复杂有机化合物 B.极容易分

涩味的特性是（）

A.能散

B.能燥

C.能敛

D.能软

E.能缓

In 1826, a Frenchman named Niepce needed pictures for his business, but he was not a good artist. So he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.

The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. This kind of photograph was called a daguerreotype. Soon, other people began to use Daguerre’s process. In about 1840, the process was improved. Then photographers could take pictures of people and moving things.

Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were very life-like and full of personality.

In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls. And finally, the invention of the small handheld camera made photography less expensive. With the small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends and favorite places. They called these pictures “snapshots”.

Photography also turned into a form of art by the end the 19^th century, some photographs were not just copies of the real world. They showed ideas and feelings, like other art forms.

小题1:Matthew Brady was well-known for _______.

A．inventing daguerreotype

B．taking pictures of French cities

C．taking portraits of famous people

D．inventing the first camera小题2:The new inventions in photography made it possible for ________.

A．Brady to take pictures of famous people

B．anyone to be a photographer

C．only rich people to take pictures

D．people to use daguerreotype小题3:Photography can also be an art form because artists can _________.

A．take pictures to show the real world

B．make documentaries

C．show ideas and feelings in pictures

D．copy old pictures

创刊于1884年的《点石斋画报》择“新奇可喜之事”绘制成图，辅以文字说明，开创了晚清新闻画报的先河。下图为1897年刊出的“御风行舟”，介绍了美国航空学实验者兰利以蒸汽机为动力装配的飞行器试飞成功的情况。据此，表述正确的是

A．《点石斋画报》是中国报刊事业开端

B．该报刊积极向国人介绍西方科技发明

C．旅美华侨冯如研制的飞机早于该实验

D．国人心态普遍演变为“开放”、“崇洋”

患者女，26岁。制衣工人。5天前不慎被针刺伤左手示指指尖，当时未予处理。3天前出现左手示指红肿、胀痛，予口服抗感染药物后无明显好转，遂来急诊。检查：体温38℃，左手示指甲沟部红、肿，伴触痛，无明显脓点吸波动感。血白细胞计数为12.0×10／L，中性粒细胞为79%。

该患者入院后给予青霉素输注及外用药膏治疗2天后仍无明显好转，且伴畏寒、发热、全身乏力等症状。查：左示指甲沟处红肿加剧，并可见脓点。下列治疗中最恰当的是（）

A.换用高档抗感染药物

B.继续按原治疗方案治疗

C.在甲沟处切开引流

D.物理治疗

E.拔除指甲

一般说，航天器机构按工作时间特点分为哪几类，举例说明？