1.病毒是一类什么样的微生物？它有什么特点？2.叙述大肠杆菌T系噬菌体的繁殖过程。
The Declaration of Independence was drafted by _____.
A. James Madison
B. Thomes Jefferson
C. Alexander Hamilton
D. George Washington
On July 4, 1776, _____ adopted the Declaration of Independerce.
A. the First Continental Congress
B. the Second Continental Congress
C. the Third Continental Congress
D. the Constitutional Convention
某企业投资项目的现值指数为1.6，则该项目的净现值率为 （ ）
A. 0.16
B. 1.6
C. 0.6
D. 2.6
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