什么是成品分析?
参考答案:
是指在经过加工的成品钢材(包括钢坯)上采取试样,然后对其进行的化学分析。
With the summer coming, May 19th was the ideal date to ______ China’s National Tourism Day. This year’s theme was “Beautiful China: Relaxing and Tourist Friendly”.
A.reflect
B.make
C.represent
D.mark
目前茶树育种的主要目标有哪些?