看了这幅漫画，请回答： （1）这位同学是否有自主学习的好习惯？ ________

下列哪项B₁细胞与B₂细胞的比较是错误的（）

A.B₁的产生早，B₂的产生晚

B.B₁细胞能自我更新，B₂则在骨髓区不断新生

C.B₁分布在外周免疫器官，B₂分布在腹腔和胸腔

D.B₁的抗体产生是针对细菌抗原和自身抗原，而B₂是针对广谱抗原

E.B₁分泌的抗体以IgM为主，B₂分泌的抗体以IgG为主

短文改错。

下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（∧）， 并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1. 每处错误及其修改均仅限一词。

            2．只允许修改10处，多者（从11处起）不记分。

     Yesterday, when I visited my cousin, I find he went to the bathroom very often. He

didn't look like alright. "What is wrong about you?" I asked him. "I think I had too many

milk this morning," he said. I asked him how. He said, "My mother went to a supermarket

yesterday afternoon. When she saw some milk on sale, she bought three big bottle. We had

to finish all milk this morning because it was no longer fresh." I knew what she meant. My

aunt wanted to save some money through buy the cheap milk. I real don't think she should

have done that.

___________________________________________________________________________

对胰腺分泌HC0^-₃的叙述，错误的是（）

A.由胰腺内小导管上皮细胞分泌

B.胆囊收缩素可引起大量分泌

C.可防止盐酸对十二指肠黏膜的侵蚀

D.可为胰酶提供适宜的作用环境

E.胃酸进入十二指肠有利于HC0^-₃的分泌

斯堪的纳维亚设计

作废烟草专卖品准运证的权限是怎样规定的？