下述治疗骨质疏松药物中,属于骨吸收抑制剂的是
A.雌激素B.钙制剂C.氟制剂D.甲状旁腺E.维生素D
参考答案:A
When your child wakes up in the morning, he should know that his daily ____ includes going to school, lunch and homework.
A.routine
B.destination
C.requirement
D.conservation
人安标规定:当发现接触网导线断落接地时,要远离()米以外,并立即通知附近接触网工区或供电调度员派人处理。
A、4
B、6
C、10
D、15