台钻钻孔应正确操作,钻头转速()时,应立即切断电源检查。
A.减低
B.增大
C.稳定
D.速变
参考答案:A
—If our parents would listen more to us, they would understand us better.
—_____.They just expect us to listen.[ ]
A. I believe not
B. No problem
C. Good idea
D. I can't agree more
甲状腺功能减退症患者有严重的智力低下,聋哑,估计其甲状腺功能减退始于
A.胎儿期或新生儿期
B.3~5岁
C.6~10岁
D.11~17岁
E.18岁以后