地球的表面积约为( )
A.4.1亿平方千米
B.5.1亿平方千米
C.6.1亿平方千米
D.7.1亿平方千米
地球表面积为5.1亿平方千米.
故选:B.
业务员要实现盈利目标,该种洗衣机的销售量至少要达到( )台。
A.150
B.200
C.300
D.400
Spyware and other forms of malware are the biggest online threat to your computer’s (71) nowadays. There malicious (72) which get to your PC through freeware, shareware, commercial sites, deceptive pop-ups or in any other way, can record your surfing habits and sites you visit, share your personal information with their partners. Any personal (73) , when in wrong hands, can leave you a victim of an "identity theft" by steeling your credit (74) details, birth records and other (75) information.
A.information
B.estate
C.life
D.existence