Refer to the(73)manual for ribbon(ink tape)installation and exchange.
A.monitor
B.printer
C.operating system
D.Disk
第1题:
Lightning is a ________ of electrical current from a cloud to the ground or from one cloud to another.
A) rush B) rainbow
C) rack D) ribbon
[译文]闪电是从云层到地面或从云层到云层的一股电流的急促运动。
[答案]A)rush
[解析]A)rush急促的动作;突击,冲击(rapid headlong movement sudden swift),electrical current可以与rush搭配使用,A)是正确答案。B)rainbow“彩虹”;C)rack“行李架,隔板”;D)ribbon“丝带,锻”,均不符合题意。
第2题:
第3题:
3、执行下列语句之后,正确的是() float m=100, n=200; float &refer_m=m, &refer_n=n;
A.&refer_m=n;
B.*refer_m=*refer_n;
C.refer_m=refer_n;
D.&refer_m=&refer_n;
第4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 nonimpact 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.
A.Hot
B.Warm
C.Heat
D.Thermal
第5题:
执行下列语句之后,正确的是() float m=100, n=200; float &refer_m=m, &refer_n=n;
A.&refer_m=n;
B.*refer_m=*refer_n;
C.refer_m=refer_n;
D.&refer_m=&refer_n;
第6题:
在ggplot2中,自定义散点图中点的颜色所用的命令为()
A.scale_colour_manual()
B.scale_linetype_manual()
C.scale_shape_manual()
D.scale_size_manual()