DME机载询问器询问时,有()波道控制方式。
A.一种
B.二种
C.三种
D.四种
参考答案:B
—We have decided to go for a picnic tomorrow, Dick.Are you going with us?
—Well, _______ you are going, so will I.
A.when
B.since
C.if
D.while
在30以内(不包括30)2和3的公倍数有______;28和70的最大公因数是______,它们的最小公倍数是______.