当变压器在6~10kV电压时,其相应的线路距离不长,故二次线圈的额定电压仅高出用电设备额定电压的()。
A、3%
B、4%
C、5%
D、6%
参考答案:C
This is my school. There are many trees and flowers in it. It’s very beautiful. The teaching building is big and tall. There is a big playground in our school. After 4:30 in the afternoon, many students come to the playground to play football and some students play table tennis in the table tennis room. There are 1,200 students and 25 classes in our school. The students all like to study. The teachers in our school are very good. They help the students to study and the students like them, too.
小题1:The school looks _____.
A.small
B.old
C.nice
D.bad小题2:The school is beautiful because of (因为) ________ in it.
A.trees and flowers
B.a playground
C.students and teachers
D.the table tennis room小题3:There are at least (至少) _____ students in one class.
A.50
B.45
C.75
D.65小题4:After class the students often go to _____.
A.their classroom
B.their homes
C.the playground
D.the teachers’ office小题5:Do the students like to study?
A.Yes,they do.
B.No,they don't.
C.Yes,they are.
D.No,they aren't.
椎基底动脉闭塞综合征()
A.单眼一过性黑矇
B.病灶对侧中枢面舌瘫与偏瘫
C.对侧同向性偏盲
D.眩晕呕吐
E.跌倒发作