mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA">一个
B.
mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA">多个
C.
mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA">只能一个
D.
mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA">可以一个或多个