下列哪一项不属于中国的兵种()
A.陆军
B.航天军
C.海军
D.空军
参考答案:B
He is said _______ a new machine recently, but I don’t know when he will make it.
A.to design
B.to be designed
C.to have designed
D.to have been designing
从甲、乙等5名学生中随机选出2人,则甲被选中的概率为()
A.A
B.B
C.C
D.D