Spring festival is regarded as the most important festival in China.
查看答案
China is listed among the four ancient civilization nations in the world..
A. 对
B. 错
According to their origins, China's festivals mainly fall into three categories, agricultural, religious and social festivals.
A. 对
B. 错
碳素营业物质的主要功能是：
A. 构成细胞物质
B. 提供能量
C. A、B两者都有
D. A、B两者都没有
占微生物细胞总重量70%-90%以上的细胞组分是（）
A. 碳素物质
B. 氮素物质
C. 水
D. 矿物质
微信支付 
支付宝支付