皮皮学，免费搜题
登录
搜题
【单选题】
关于小儿特异性细胞免疫哪一项是错误的（ ）A.
胸腺是淋巴样干细胞分化发育为成熟T细胞的场所
B.
胸腺出生时与体重之比值是一生中最大的，可在X线胸片前上纵隔部位显影。
C.
婴儿时期CD/CD的比值较成人水平低
D.
小于胎龄儿和早产儿的T细胞数量较少
E.
T细胞可以产生白介素、干扰素和肿瘤坏死因子等细胞因子
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What do people usually purchase in a boutique?
A.
Electric appliances
B.
Clothes
C.
Food
D.
Furniture
【单选题】People in western countries usually celebrate Christmas, people in China observe the Spring Festival.
A.
so
B.
because
C.
which
D.
while
【单选题】Following are comments about the behavior. that people in Korea usually expect in various social ________.
A.
occasions
B.
cases
C.
situations
D.
circumstances
【单选题】Usually people in Japan and Korea bow when they meet for the first time. [ ]
A.
supposed
B.
are supposed
C.
are supposed to
D.
suppose
【单选题】Usually people in Japan and Korea _____ when they meet for the first time. [ ]
A.
are supposed to kiss
B.
are supposed to bow
C.
suppose to kiss
D.
suppose to bow
相关题目：