做绕组对地交流耐压试验时,如果电压表的指示( ),电流表的指示迅速增加,则说明对地绝缘被击穿。
A.不变
B.降为零
C.升高
D.调压器
参考答案:B
在自然状态下,可以形成新个体的是( )
①精子 ②卵细胞 ③胚轴 ④受精卵 ⑤孢子.
A.①②③④⑤
B.①②③⑤
C.①③④⑤
D.④⑤
Only after the woman had her own child ______how difficult it was to be a mother.
A.she realized
B.had she realized
C.she had realized
D.did she realize