【单选题】How can we protect ourselves from this new and deadly virus according to the passage?
A.
Do not contact with anyone showing symptoms of coughing and sneezing
B.
Do not contact with anyone showing symptoms of fever and shortness of breath
【多选题】多选下列属于公共政策制定的直接主体( )
【单选题】未在《凡尔赛合约》上签字的国家是( )。
【简答题】一元运算符( )将一个输入取反。 a.AND b.OR c.NOT d.以上都是A. c.NOT