农作物受到药害后出现哪些症状?
参考答案:
农作物受到药害后会出现黄花、斑点、畸形、枯萎、停止生长、不孕、脱落等不同症状。
The car _______ in Germany in the 1960slooks old now.
A.produced
B.producing
C.to produce
D.which produced
中国是利用煤炭最早的国家。