T细胞和B细胞发生免疫应答的场所是()
A.骨髓
B.外周免疫器官
C.中枢免疫器官
D.胸腺
E.血液
参考答案:B
To his surprise, his new play well ____ by the public in China, met a cold welcome abroad.
A.received
B.accepted
C.accepting
D.receiving
该公司收入大于支出最多的一个月是()。
A.1月
B.9月
C.10月
D.12月