已知a＜b，则下列不等式一定成立的是[ ]
A.a+3＞b+3
B.2a＞2b
C.-a＜-b
D.a-b＜0
答案：D
在这种环境里行车使用近光灯。
Go ____ the gate and you' 11 find the entrance ____ the park ____ the other side.
A．through; to; on
B．along ;of; on
C．down; to; at
D．up; of; by
