问题
单项选择题
福氏佐剂分为不完全佐剂和完全佐剂，佐剂和抗原比例为（）
A.1：1
B.1：2
C.1：3
D.2：1
E.3：1
答案
参考答案：A
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福氏佐剂分为不完全佐剂和完全佐剂，佐剂和抗原比例为（）
A.1：1
B.1：2
C.1：3
D.2：1
E.3：1
参考答案：A
My name 31 Bill. I’m 32 English boy. I’m twelve. I’m a middle school student. Li Lei is my 33 . We’re in the same class. Here is a photo 34 his family. Look, this is his 35 . He is a policeman. His 36 is a teacher of English. She is a good teacher. Li Lei has 37 sisters. 38 are twins(双胞胎). Their 39 are Fang Fang and Yuan Yuan. They have a cat. We are good 40 ,too.
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