During the summer holiday，I took a job in a shop；________my friends went to the seaside to relax themselves.
A：besides
B：therefore
C：meanwhile
D：otherwise
— Will you help me with the trouble?
— I won't, you tell me the truth.
下列关于聚落保护的说法，正确的是（ ）
细胞的一生经历了增殖、分化、衰老、凋亡等过程，下列关于细胞生命历程的说法正确的是（ ）
一块三角板中，有____个角。
关于蚯蚓说法正确的是（ ）
