S模式询问:().
A.是A模式和C模式的组合
B.只与TCAS联合使用
C.可以实现有选择性的点名询问
D.仅用于飞机之间的相互询问,避免飞机相撞
参考答案:C
Questions 1-4
Which of the following can be concluded about the woman?()
A.She dislikes the man’s wife.
B.She enjoys spending money on cosmetics.
C.She is married to a poor man.
D.She is economical with her money.
石油、化工行业是危险性较大的行业,这主要是由所处理物料的危险性及工艺过程的危险性决定的。这些物料具有的危险性是( )。
A.易燃、腐蚀性
B.易燃、易爆
C.易燃、易爆、毒性、腐蚀性
D.易燃、易爆、毒性