磁场强度不变,试验频率增加时,则试件表面涡流密度().
参考答案:增加
― I guess you were in a hurry. Look! You _______ your sweater inside out.
A.hadworn
B.wore
C.arewearing
D.werewearing
—Will you come to this dinner party?
—I won’t come unless Jenny _______.[ ]
A. will be invited
B. is invited
C. will invite
D. invited