【单选题】救援列车进入封锁区间的行车凭证为( )。
【单选题】救援列车进入封锁区间的行车凭证为( )。
【多选题】Which of the followling sentences are correct about the Mongolian wedding?
A.
There are two kinds of wedding customs used to be in fashion among the Mongolian people.
B.
one of the wedding customs in the past was snatching a maiden to make her a bride.
C.
the another wedding customs is making a proposal of marriage to the girl and her parents by offering betrothal gifts.
D.
the wedding custom making a proposal of marriage to the girl has been handed down until now
【单选题】下列关于线圈磁化的叙述中,正确的是()
B.
当用直流电磁化长度、外径和材质都相同的钢圆棒和钢圆管时,钢管受到的磁场作用较强
C.
把多个细长试件捆为一匝装满线圈,能得到强的磁化效果
D.
磁化同一试件,在线圈内通以交流电比通以同幅值的三相全波整流电的磁场强度要大
【单选题】下列关于线圈磁化的叙述中,正确的是:
B.
当用直流电磁化长度、外径和材质都相同的圆钢棒和圆钢管时,钢管受到的磁作用较强
C.
把多个细长试件捆为扎装满线圈, 能得到强的磁化效果
D.
磁化同一试件,在线圈内通以交流电比通以同幅值的三相全波整流电的磁场强度大
【单选题】60下列关于线圈磁化的叙述中,正确的是:( )
B.
当用直流电磁化长度、外径和材质都相同的圆钢棒和圆钢管时,钢管受到的磁场作用较强
C.
把多个细长试件捆为一匝装满线圈,能得到强的磁化效果
D.
磁化同一试件,在线圈内通以交流电比通以同幅值的三相全波整流电的磁场强度要大
【单选题】下列关于线圈法磁化的叙述,正确的是()。
【判断题】In the past, a bride would not be regarded as a member of her husband's famliy unless she practiced the rite of Miaojian.