Without software instructions, the computer doesn’t know what to do.
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People can make decisions according to the data collected in a variety of ways.
A. 对
B. 错
The facts and figures can be converted into useful information by the computer.
A. 对
B. 错
All data can be changed into information.
A. 对
B. 错
关于β-内酰胺类抗生素的结构特点,错误的是哪一个
A. 稠合环不共平面
B. β-内酰胺环不是正方形,是一个平面结构
C. 四元β-内酰胺环均通过N原子和邻近的碳原子与1个五元或六元环稠合
D. 青霉素类分子中有8个旋光异构体,头孢菌素类有4个旋光异构体
E. 青霉素类抗生素具有活性的绝对构型为2S,5R,6R