题干
.
— I’m dead tired. I can’t walk any farther, Jenny.
— ________, Tommy. You can do it!
— I’m dead tired. I can’t walk any farther, Jenny.
— ________, Tommy. You can do it!
A：No problem
B：No hurry
C：Come o
D：That’s OK
答案(点此获取答案解析）
C
性免疫发挥作用的主要是淋巴细胞