问答题

In winter drivers in northern part of China have to use () in order to set their.

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单项选择题

在MCS51单片机中()。

A.具有独立的专用地址线
B.由P0口和P1口的口线作地址线
C.P0和P2口的口线作地址线
D.由P1口和P3口的口线作地址线

The motor industry has been developing rapidly in recent years and it provides cars with () brakes, traction controls and many other devices which we didn't have before.