新车()必须在指定路线(段)进行,严禁在其它路线(段)或厂区试验制动。
参考答案:试车
已知直线l1:x+my+6=0,l2:(m-2)x+3y+2m=0,求m的值,使得:(1)l1⊥l2;(2)l1∥l2;(3)l1∩l2.
The flood killed _____ people. [ ]
A. over five hundred
B. hundreds of
C. hundred of
D. A & B