A webcam is a digital camera that sends video images to other computer users. It’s about the (1) of a golf ball and typically (2) on top of your computer monitor. Once the webcam is (3) to the USB port of your computer with the necessary software,(4) images of you can be sent to one or more users over the Internet (5) an instant messaging(IM) service.
A webcam costs about $50. More expensive models come with added (6) , such as better picture resolution. Two leading makers, Logitech and Creative, offer a range of models,(7) software is included. There is no extra Internet(8) to send or receive video images, though you’ll have to (9) for a free instant messaging service. Everyone can see and hear one another in (10) time. Grandparents can see their grandkids more (11) Webcams can work with almost any computer bought in the past five years and can (12) long distance phone bills.
(13) you have broadband, that is, a high-speed cable-modem or DSL connection
A. live
B. living
C. lively
D. lovely
| Many theories concerning the causes of
juvenile delinquency focus either on the individual or on society as the major
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suggest that children engage in criminal behavior{{U}} (32) {{/U}}they
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{{/U}}as a rejection of middle-class values. Most theories of juvenile delinquency have focused on children from disadvantaged families, ignoring the fact that children from{{U}} (36) {{/U}}homes also commit crimes. The latter may commit crimes{{U}} (37) {{/U}}lack of adequate parental cont A. as B. by . C. for D. with [单项选择]《关于调整列车乘务饭价格的通知》乘务饭正餐（午、晚）每份售价（）元，其中主食200克。
A. 5 B. 10 C. 15 D. 20 [单选题] [单选题]抽查人工信息采集点实物库存与手工采集库存的一致性,每次抽查牌号不少于()个。
A.3 B.4 C.5 D.6 [判断题]一张电力通信工作票中，工作许可人与工作负责人不得互相兼任。若工作票签发人兼任工作许可人或工作负责人，应具备相应的资质，并履行相应的安全责任。
A.正确 B.错误 [单项选择]心绞痛及昏厥常见于：（）
A. 二尖瓣狭窄 B. 二尖瓣关闭不全 C. 主动脉瓣狭窄 D. 主动脉瓣关闭不全 E. 三尖瓣狭窄 [单项选择]苷键被酸催化水解的难易顺序是
A. O-苷＞S-苷＞C-苷＞N-苷 B. N-苷＞O-苷＞S-苷＞C-苷 C. C-苷S-苷＞O-苷＞N-苷 D. S-苷＞O-苷＞N-苷＞C-苷 E. C苷＞N-苷＞O-苷＞S-苷 [单选题]三棱针散刺法适用于
A. 头痛 B. 高热惊厥 C. 中风昏迷 D. 局部瘀血 E. 咽喉肿痛 [简答题]时钟的主要功能?
[单项选择]下列果树童期最短的是（）
A. 梨 B. 桃 C. 柑橘 D. 龙眼 [单项选择]《大气污染物综合排放标准》(GB 16297—1996)中规定，现有污染源无组织排放氮氧化物的浓度限值为( )。
A. 0.10 mg/m3 B. 0.12 mg/m3 C. 0.15 mg/m3 D. 0.20 mg/m3 我来回答: 提交
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