升级BTS3900的软件包括以下步骤：（） A.配置基站软件 B.下载基站软件 C.

以下哪一项不符合海绵型血管瘤的症状（）

A.由大小形状不一的血窦组成

B.肿瘤边界不清

C.有钙化结石

D.呈杨梅样突出于皮肤

E.体位移动试验阳性

简述新产品开发的方向？

鼻中隔动脉的分布中没有下列哪项()

A．筛前动脉

B．筛后动脉

C．内眦动脉

D．鼻腭动脉

E．颈内动脉的分支

甲、乙、丙三种物质的溶解度曲线如下图所示。据图回答：

（1）要使乙从其浓溶液中大量析出，应采用        结晶法；

（2）甲、乙、丙三种物质中常温下可能是气体物质的是     ；

（3）30℃时，向一支盛有4 g甲的烧杯内加入10mL水，充分搅拌后，静置，得到         溶液（填“饱和”或“不饱和”）；

（4）50℃质量分数为25％的乙溶液，降温至10℃，      晶体析出（填“有”或“无”） 。

Ink-jet printer belongs to nonimpact printers in which the characters are formed by projecting particles or droplets of ink on to paper. (71) printer is also a n0nimpact printer in which the characters are produced by applying hot elements to heat-sensitive paper directly or by melting ink from a (72) on to plain paper. Electrostatic printer creates an electrostatic latent image, which is then made visible by a toner and transferred and fixed on paper. An electrostatic printer may be used in some instances as a (73) . Laser printer creates, by means of a laser beam directed on a (74) surface, a latent image which is then made visible by a toner and transferred and fixed on paper. Magnetographic printer creates, by means of magnetic heads operating on a metallic drum, a latent image which is then made visible by a toner and transferred and fixed on paper. Computer-output-microfilm (COM) printer produces on a photographic film a (75) of each page.

（72）是（）

A.belt

B.ribbon

C.tape

D.band