接闪器由()、()、()、()等组成。
参考答案:避雷针、避雷线、避雷带、避雷网
Bill __________ his wife that he ________ when the fire broke out.
A.tells, is sleeping
B.told, was sleeping
C.told, slept
D.had told, had slept
某男子21岁,身高只有70厘米,而且智力低下,这可能是因为他在胎儿期( )
A.生长激素不足
B.甲状腺激素不足
C.肾上腺激素不足
D.胰岛素不足