环行抓棉机，抓棉打手锯齿刀片的排列方式是（） A.由内到外逐渐变密 B.由内到外逐渐

在下面的“       ”上填上合适的词语。

               的桃花心木                的少年                 的掌声   

             的双眼                         的痕迹                 地回去

腹水量超过多少毫升时，体检可发现移动性浊音

A．100ml

B．200ml

C．500ml

D．300ml

E．1000ml

化学使生活更美好：

①化肥的使用大幅度提高了粮食产量。如K₂CO₃是一种 _________ 肥（填“氮”、“磷”或“钾”），K₂CO₃的溶液显________性，用K₂CO₃进行焰色反应，透过蓝色钴玻璃看到的火焰呈__________色。

②广泛使用电动车，有效减少了CO₂、SO₂、CO的排放，这些物质中会引起温室效应的是_________，会造成酸雨的是_________，能与血液里的血红蛋白结合，造成 人体中毒的是_____________ 。

下列对孟子及其思想主张描述正确的是：（）

A、山东邹城人

B、主张人性本善

C、提出君主要施行仁政

D、上述三项都对

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