标志设计的现代构成表现形式包括（ ）

正偏差变量取正值，负偏差变量应取负值。A．正确 B．错误

不定项选择正偏差变量取正值，负偏差变量应取负值。

讯问具备哪些特点？A．强制性 B．冲突性 C．直接性 D．时限性

多项选择题讯问具备哪些特点？

Processessays can be classified as scientific, historic...

单项选择题Processessays can be classified as scientific, historic or advisory. Please selectfrom the following choices the wrong match. 
A、Scientific: how clouds form 
B、Historic: how American law changed after 9/11 
C、Advisory: how global warming leads to ocean acidification