The Tibet Autonomous Region is 1.22 million sq.km. in area, with an average ______ of over
A. aptitude
B. latitude
C. altitude
D. gratitude
If you want to know more details about these buildings, you can go to the sales office and
A. advertisement
B. brochure
C. introduction
D. book
10kv电力线路在电流速断保护的死区内发生短路故障,一般由()动作跳闸。
A. 过电流保护
B. 手动
C. 瓦斯保护
D. 差动保护
气流速度在重力脱水器降低,凝聚的粗颗粒粉尘能在()作用下与气体分离而沉降。
A. 离心力
B. 电磁力
C. 搅拌
D. 重力