有关前庭大腺，哪项不恰当（） A.开口于前庭后方小阴唇与处女膜之间的沟内 B.位于大

如图所示为某家族中白化病遗传系谱，请分析并回答下列问题(以A、a表示有关的基因)：

(1)该致病基因是____________性的。

(2)5号、9号的基因型分别是_____________和_____________。

(3)8号的基因型是________(比例为__________)或_________(比例为___________)；10号的基因型是____________(比例为_____________)或_____________(比例为____________)。

(4)若8号与10号婚配，则后代中出现白化病的几率是____________。

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的作文, 文中共有10处语言错误,每句中最多有两处。错误涉及一个单词的增加,删除或修改。 

增加:在缺词处加一个漏字符号(^) ；

删除:把多余的词用斜线(/)划掉；

修改:在错的词下面划一横线,并在该词下面写出修改后的词。

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（从第11处起）不计分；

3. 改错在答题纸上做。

In England, nobody under 18 are allowed to drink in a bar. Mr. Thompson used to going to a bar near his house, or he never took his son, Tom, because he was too young.

Then when Tom had his eighteen birthday, Mr. Thompson took him to his usual bar. After drinking at half an hour, Mr. Thompson said to his son, “Tom, I want to teach you an useful lesson. You must always be careful never drink too much.”

“How do you know how you’ve had enough?” asked Tom.

“Do you see those two lights at the end of the bar? When it seem to have become four, you’ve had enough and should go to home.”

“But , Dad, I can see only one,” said Tom.

太平天国农民战争爆发的根本原因是（）

A.封建专制 * * 和地主阶级对农民的政治压迫和经济剥削

B.鸦片战争的爆发

C.自然灾害频发

D.洪秀全等人的宣传

倾斜巷道必须设置“一坡三挡”，“一坡三挡”的内容是什么？

溶解氧是指水中所溶解的分子状态氧的多少，常用（）来表示，养殖鱼类的最适溶解氧为（）。