关于世界各地降水量的叙述,正确的是( ) A.山地迎风坡比背风坡容易产生降水 B

题型:选择题

问题:

关于世界各地降水量的叙述,正确的是(  )

A.山地迎风坡比背风坡容易产生降水

B.赤道地区蒸发旺盛,不易产生降水

C.两极地区终年寒冷,是多雨区

D.中纬度内陆地区降水比沿海地区多

考点:降水和降水的分布
题型:选择题

如图所示.AB为斜面,其倾角为30°,小球从A点以初速度v0水平抛出,恰好落到B点.求:

(1)A、B间的距离;

(2)物体在空中飞行的时间;

(3)从抛出开始经过多长时间小球与斜面间的距离最大?

题型:选择题

子痫患者为控制抽搐需立即处理时,主要选用的药物中不包括:

A.吗啡

B.冬眠合剂

C.5%葡萄糖盐水

D.硫酸镁

E.哌替啶

题型:选择题

某污水处理建设项目需采购一批设备,按照规定必须进行招标采购的的标准是单项合同估算价在(  )万元人民币以上。

A.50

B.100

C.150

D.200

题型:选择题

粘贴硬木地板条时首先用齿形刮胶板在已选备好的硬木地板背后均匀的刮一层胶粘剂,其胶的厚度以不超过()为佳。

A.0.3mm

B.0.1mm

C.0.5mm

D.0.6mm

题型:选择题

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

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