问题 填空题 案例分析题

下图1和2是某母鸡的某些生理过程调节示意图,请据图分析回答问题。

向母鸡注射促性腺激素,会使下丘脑的促性腺激素释放激素分泌减少。对此现象的解释有两种观点,观点一:这是促性腺激素直接对下丘脑进行反馈调节的结果;观点二:这是促性腺激素通过促进卵巢分泌雌性激素,进而对下丘脑进行反馈调节的结果。请你设计实验探究哪种观点正确。实验步骤:

①将生理状况相同的母鸡分为A、B两组,测定两组动物血液中()的含量。

②用手术器械将A组母鸡的()(器官)切除,B组做相同的外伤手术,但不摘除此器官。

③向A、B两组母鸡注射()。

④在()条件下喂养母鸡并作观测。

⑤—段时间后,测定两组动物血液中()的含量。

实验结果及结论:

⑥若(),则观点一正确;

⑦若(),观点二正确。

答案

参考答案:①促性腺激素释放激素;②卵巢;③等量且适宜浓度的促性腺激素;④相同且适宜的环境;⑤促性腺激素释放激素;⑥A组母鸡和B组母鸡促性腺激素释放激素减少量相等;⑦A组母鸡促性腺激素释放激素不减少,B组母鸡促性腺激素释放激素减少

完形填空
阅读下面短文,从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
Many years ago, Dad worked as a farmhand (农场工人). At that time, he had a horse. Every Saturday he __31   to the town after dinner and spent a few hours on social   32  with other farmhands, such as drinking, chatting, and playing cards in the café. On Saturday evenings, the café was   33  because many farmhands were there. Before midnight Dad returned home on his horse, quite satisfied with his   34 . In his words, he   35  thought of changing his job.
At the age of 31, Dad married my mother who was a schoolteacher. In the following spring I came   36  into the world. Life became hard, so my mother felt   37  . She told Dad that they must make a   38  .
My mother had   39  of how some famous persons, especially Thomas Edison who was born in a poor family, fought against fate and achieved greatness and   40  . And she   41  that I would some day become a great leader   42  men or cities and Dad should be a successful businessman. So she   43  Dad to give up his job as a farmhand, sell his horse and   44  a small business of his own. And I went to high school and college. She even sent me abroad for   45  education when I graduated from college. Under the drive of my mother’s hope, Dad and I   46  what we have today. Dad runs a big international   47  and I am a successful lawyer   48  great fame in my country,   49  not a leader as my mother expected.
Dad said, without my mother, we wouldn’t be what we are today; at least, he would remain a farmhand.   50  he got a lesson of life —sometimes we really need drive from outside.
小题1:
A.rodeB.walkedC.ranD.drove
小题2:
A.conversationsB.gamesC.relationshipsD.activities
小题3:
A.cold B.crowdedC.quietD.dirty
小题4:
A.horse B.entertainmentC.lifeD.beer
小题5:
A.often B.everC.never D.sometimes
小题6:
A.laughingB.singingC.sleepingD.crying
小题7:
A.unimportant B.busyC.unsatisfied D.tired
小题8:
A.living B.changeC.decisionD.house
小题9:
A.dreamedB.heardC.thoughtD.spoken
小题10:
A.honestyB.moneyC.fameD.energy
小题11:
A.caredB.knewC.forgotD.hoped
小题12:
A.trainingB.ruling C.helping D.protecting
小题13:
A.warnedB.wantedC.allowedD.persuaded
小题14:
A.start B.findC.design D.sell
小题15:
A.farther B.higherC.easierD.closer
小题16:
A.showed B.keptC.lostD.achieved
小题17:
A.company B.schoolC.farmD.café
小题18:
A.sufferingB.sharingC.enjoying D.following
小题19:
A.thoughB.ifC.andD.since
小题20:
A.SoB.HoweverC.Or D.Because
单项选择题