在动物细胞工程和胚胎工程中所用的物质和其发挥的作用正确的组合是() A.肝素——诱导

题型:单项选择题

问题:

在动物细胞工程和胚胎工程中所用的物质和其发挥的作用正确的组合是()

A.肝素——诱导精子与卵细胞受精

B.胃蛋白酶——动物细胞培养时分散细胞

C.聚乙二醇——诱导细胞分化

D.促性腺激素——促进供体母畜超数排卵

考点:高中生物克隆技术克隆技术题库
题型:单项选择题
When I was thirteen, my family moved from Boston to Tucson, Arizona. __36__the move, my father __37__us in the living-room on a freezing January night. My sisters and I sat around the fire, not __38__ that the universe would suddenly change its course. “In May, we′re__39__ to Arizona.”
The words, so small, didn't seem__40__enough to hold my new life. But the world changed and I awoke on a tram moving across the country.1 watched the __41__change from green trees to flat dusty plains to high mountains as I saw strange new plants that __42__ mysteries yet to come. Finally, we arrived and __43__ into our new home.
__44__ my older sisters were sad at the loss of friends, I _45_explored our new surroundings.
One afternoon, I was out exploring __46__ and saw a new kind of cactus(仙人掌). I crouched(蹲)down for a closer look. “You'd better not __47__ that”
I turned around to see an old woman.
“Are you new to this neighborhood?” I explained that I was, __48__,new to the entire state.
“My name is Ina Thorne.” Have you got used to life in the __49__? It must be quite a __50__ after living in Boston.”
How could I explain how I __51__ the desert? I couldn’t seem to find the right words.
“It’s vastness,” she offered. “That vastness __52__ you stand on the mountains overlooking the desert—you can __53__ how little you are in comparison with the world. __54__, you feel that the possibilities are limitless.”
That was it. That was the feeling I’d had ever since I’d first seen the mountains of my new home. Again, my __55__ would change with just a few simple words.
“Would you like to come to my home tomorrow?” Someone should teach you which plant you should and shouldn’t touch.”
小题1:
A.During B.UntilC.UponD.Before
小题2:
A.gatheredB.warned C.organizedD.comforted
小题3:
A.hoping B.admitting C.realizing D.believing
小题4:
A.goingB.movingC.driving D.flying
小题5:
A.good B.simple C.bigD.proper
小题6:
A.picture B.groundC.sceneD.area
小题7:
A.suggested B.solvedC.discoveredD.explained
小题8:
A.settledB.walkedC.hurriedD.stepped
小题9:
A.IfB.AfterC.OnceD.While
小题10:
A.bitterlyB.easilyC.proudlyD.eagerly
小题11:
A.as wellB.as usualC.right awayD.on time
小题12:
A.moveB.digC.pullD.touch
小题13:
A.of courseB.in factC.after allD.at least
小题14:
A.desertB.cityC.stateD.country
小题15:
A.luckB.doubtC.shockD.danger
小题16:
A.foundB.examinedC.watchedD.reached
小题17:
A.why B.whenC.howD.where
小题18:
A.proveB.guessC.senseD.expect
小题19:
A.HoweverB.OtherwiseC.ThereforeD.Meanwhile
小题20:
A.ideaB.lifeC.homeD.family
题型:单项选择题

理想溶液要求在工作条件下,应(),密度大。

A、流动慢

B、粘温系数小

C、粘度小

D、温度高

题型:单项选择题

色素沉着绒毛结节滑膜炎,最常见于()

A.膝关节

B.踝关节

C.肩关节

D.肘关节

E.腕关节

题型:单项选择题

下列属于行政处罚的有()。

A.行政拘留

B.剥夺政治权利

C.警告

D.降级

E.撤职

题型:单项选择题

确定定级对象安全等级的定级要素包括()

A、经济价值

B、社会影响力

C、规模和服务范围

D、所提供服务的重要性

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