电路中的中间环节(如变压器、输配电线路和开关设备等)起()和()的作用。
参考答案:传输电压、配电
阅读短文,并根据首字母提示完成短文。
We have been in Australia for three days. We're having a g 1 time here. Australia is the sixth largest
country in the world. There is so m 2 to see that it is impossible for me to tell you everything. Sydney is a
beautiful city. There are many tall t 3 and beautiful flowers around the houses and they l 4 really beautiful.
There are also some special a 5 in Australia, such as kangroos (袋鼠) and koalas (考拉). They are really
lovely.
During the past three days we have visited many p 6 of interest around Sydney. I'd like to spend more
time here, but we will f 7 to another city, Carins, to see coral beds (珊瑚床) tomorrow. It is said that words
cannot d 8 the beauty of the colorful coral. Many famous cartoon films were made there. Now we are b 9
packing our bags so that we will not lose time when we leave. We can enjoy ourselves in Cairns this time
tomorrow. I 'm looking forward to g 10 there.
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6. 7. 8. 9. 10.
()通过网络向用户提供计算机(物理机和虚拟机)、存储空间、网络连接、负载均衡和防火墙等基本计算资源;用户在此基础上部署和运行各种软件,包括操作系统和应用程序。
A、基础设施即服务
B、平台即服务
C、和软件即服务
D、门禁即服务