测定0.05级交流仪表检定装置的试验标准差,应用稳定性好、分辨率高的仪表,在装置常用量程的上限进行不少于()次的重复测试。
A、3
B、5
C、10
D、8
参考答案:B
A.Giving the kids a more caring environment.
B.Setting up a responsible school system.
C.Taking harsh actions against violence in the school.
D.Keeping the kids under one-to-one surveillance.
三日疟的临床特征有()
A.多发病于晚秋及初冬
B.3日发作一次,周期相对固定
C.起病当日血中即可查出疟原虫
D.脾大突出
E.起病多缓慢