【简答题】__________ [A] merchants [B] travelers [C] investors [D] executives
【单选题】What is NOT true according to the article?
A.
Executives tend to ignore doctors' advice and warnings.
B.
Executives are sensitive to pressure from the younger generation.
C.
All chief executives can earn millions of dollars a year.
D.
Executives are careful of what they eat.
【单选题】根据《自然保护区条例》规定,自然保护区分为国家级自然保护区和地方级自然保护区,其根据是________。
【简答题】What are the responsibilities of the senior executives in a company? They establish the ______ for their companies.
【单选题】下列有关TCP和UDP的说法错误的是( )。
A.
数据从应用程序中以字节流的形式传给TCP,而在UDP中,应用程序发送的是数据块
B.
在TCP传输控制中,序号和确认号用来确保传输的可靠性。
C.
UDP并不提供对IP协议的可靠机制、流控制以及错误恢复功能等
D.
网络文件系统(NFS)、简单网络管理协议(SNMP)、域名系统(DNS)以及简单父件传输系统(TFTP)的传输层都是用TCP实现的。
【判断题】电力MOS场效应晶体管简称P-MOSFET,具有驱动功率小、控制线路简单、工作频率高等特点。