在设计强调造型庄重和要求强度大的服装时要用()。
A、真丝
B、横丝
C、斜丝
D、直斜丝
参考答案:D
HBV的传播途径不包括()
A.血液传播
B.母婴传播
C.性传播
D.日常生活接触
E.虫媒传播
The city of Qingdao has been working on building itself up as a city of sails ________ it successfully hosted the 2008 Olympics’ sailing program.
A.after
B.since
C.when
D.until