Soon, more of the information we receive via the Internet could come (31) in digital wrappers.
Wrappers are made up (32) software code that’s targeted to do specific things with the data (33) within them, such as helping to define queries for search engines. They also keep (34) from (35) access to that code.

A．package

B．packaged

C．packages

D．packaging

以下药物可发生的反应是：盐酸四环素在pH2.0～6.0时（）.

A．硫色素反应 

B．麦芽酚反应 

C．Kober反应 

D．差向异构化反应 

E．铜盐反应