大多数DNA病毒的基因组是( )。
A．dsDNA分子
B．ssDNA分子
C．双链RNA分子
D．单链RNA分子
参考答案：A
All these gifts must be mailed immediately ______in time for Christmas. [ ]
A. so as to have received
B. so as to be received
C. so as to be receiving
D. so as to receive
由于社会经济、政治、技术及组织等方面发生变动而导致损失的风险属于( )。
A．动态风险 B．经济风险 C．政治风险 D．技术风险
