During the first 24 hours after a client is diagnosed with addisonian crisis, which of the following should the nurse perform frequently

A. Weigh the client.
B. Test urine for ketones.
C. Assess vital signs.
D. Administer oral hydrocortison

【选修3-5选做题】

下列说法正确的是  [ ]

A．电子的衍射现象说明实物粒子的波动性

B．²³⁵U的半衰期约为7亿年，随地球环境的变化，半衰期可能变短

C．原子核内部某个质子转变为中子时，放出β射线 

D．氢原子的核外电子由较高能级跃迁到较低能级时，要释放一定频率的光子，同时电子的动能增加，电势能减小