【单选题】Since Wallerstein's study, ______.
A.
there are fewer divorces
B.
children of divorce no longer get therapy
C.
times and attitudes toward divorce have changed
D.
people don't talk about divorce any more
【单选题】Nine temporary hospitals with more than 6,900 beds were operational. ( )
B.
Nine temporary hospitals
C.
Nine temporary hospitals with more than 6,900 beds
【单选题】Google has made a huge progress in autonomous driving in a longe period of time.
【单选题】Yes, ______ is difficult to find a job nowadays, but _____ is more difficult is try to find such a job with a high salary but little things to do.
【判断题】现代数字电子计算机运行时遵循的存储程序工作原理最初是由 乔布斯 提出的。
【单选题】不属于电子商务系统组成成员的是
C.
相关的安全交易协议(SET、SSL、S/MIME、S-HTTP、HTTPS等)
D.
银行(包括商户银行,又称收单银行;支付网关)
【判断题】在产品生命周期成熟期,利润一般为负。 ( )