Heilongjiang is in the of China.A. north—eastB. north---westC. east---northD. west---north

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(答案→)A. north—east
B. north---west
C. east---north
D. west---north
解析：north—east 东北；north---west西北；没有C,D这种表达方式。句意：黑龙江在中国的东北。选A。