智能网的业务交换点一般以()为基础,再配以必要的软硬件以及No.7公共信道信令网接口。
A.数字程控交换机
B.模拟交换机
C.步进制交换机
D.纵横制交换机
参考答案:A
从括号中选出适当的词填空,把句子补充完整。
1. California is a city of (America, Canada).
2. (Where, What) does an elephant live?
3. Are there many (city, cities) in this country?
4. My mother works (on, in) Beijing.
5. My little sister is (younger, older) than me.
6. East points (left, right) on the map.
航迹舵组件获取连续船位较理想的传感器是()。
A.LORAN-C
B.DECCA
C.NNSS
D.GPS