The author concluded that ___________.
A. there are fewer people choosing online shopping than those doing shopping offline
B. people tend to buy more after gathering up-to-date information online
C. distribution of products like music and banking costs less than it does in the traditional channel
D. Internet shopping is just an addition to the traditional means of shopping
Mother ___________ my poem while my father considered it clumsy.
A. poured scorn on
B. cast light on
C. heap praise upon
D. gave vent to
相关系数的符号是用
A. ｒ
B. η
C. Bq
D. nt/D
E. [α]20/D
0.00850为简便可写成
A. 0.85×10-2
B. 8.5×10-3
C. 85×10-4
D. 8.50×10-3
E. 850×10-5
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