下列有关化学用语错误的是
A.乙醇分子球棍模型:
B.聚乙烯的结构简式n
C.-OH的电子式:
D.CH4Si的结构式:
答案:D
A multigravida at 36 weeks’ gestation visits the emergency department because her boyfriend has beaten her severely. What should the nurse do first
A. Contact the authorities.B. Ensure the client’s safety.C. Identify a support person.D. Photograph the client’s injuries.
系统出现死锁的原因是
A.计算机系统发生了重大故障
B.有多个封锁的进程同时存在
C.若干进程因竞争资源而无休止地等待其他进程释放已占有的资源
D.资源数大大少于进程数,或进程同时申请的资源数大大超过资源总数