先天性愚型是一种常见的人类遗传病,致病的原因是() A.基因突变 B.基因重组 C.

题型:单项选择题

问题:

先天性愚型是一种常见的人类遗传病,致病的原因是()

A.基因突变

B.基因重组

C.染色体变异

D.营养不良

考点:高中生物人类遗传病人类遗传病题库
题型:单项选择题

下列结构中,哺乳动物所特有的是:[ ]

A.卵巢

B.膈

C.牙齿

D.大脑

题型:单项选择题

句型转换.

1. I can't decide which one I should buy.(改为简单句)

    I can't decide which one _____ _____.

2. I think the school uniform are very nice. (就划线部分提问)

    _____ _____ you think about the school uniform?

3. Why not keep an English notebook? (改为同义句)

    Why ______ _____ keep an English notebook?

4. Miss Gao has taught English for nearly six years. (就划线部分提问)

    _____ _____ has Miss Gao taught English?

5. The students had to get to the bus station before seven. (改为反意疑问句)

    The students had to get to the bus station before seven, _____ _____ ?

6. I have already finished doing my homework. (改为否定句)

    I _____ finished doing my homework _____.

7. I' like a teaspoon of honey.(就划线部分提问)

    _____ _____ honey would you like?

8. I get my mother's help by making phone calls.(就划线部分提问)

    _____ _____ you get your mother's help?

题型:单项选择题

用高压蒸汽灭菌时当压力达到____________kPa,温度可达____________℃,此状态下维持____________分钟,即可杀死一切微生物。

题型:单项选择题

审美关系

题型:单项选择题

消防中队在执勤战备管理中,应时刻处于()状态,以保证完成执勤备战任务。

A、一级战备

B、二级战备

C、战备

D、休息

更多题库