A:广泛和相对集中的分布特点
B:类型齐全的特点
C:爆发频繁的特点
D:规模巨大的特点
用所给单词填空
(1)Sometimes we ____ food at home. (2)I ____ drinking milk. (3)We often ____ CCTV news at 7:00 in the evening. (4)I ____ the Internet once a day.(5)The results for “read English books”____ fun.(6)How often do you ____ to the English corner? (7)Everyone will____ you if you need any help.(8)The sun ____ once a day. (9)Walking can ____ you in good health.(10)I____ nine hours every night.
实验室部分装置如图所示,请回答下列问题:
下列关于洋流的说法不正确的是( )
下列常见的生活物品中所含的主要材料,属于有机合成材料的是( )