一般位置平面,投影到三个视图上,其边线及开头将不变。
参考答案:错
There _______ some sports news on TV tomorrow. [ ]
A has
B are
C will be
D will have
硫化橡胶的再生配合剂简称再生剂是再生软化剂、活化剂、()的总称。