假定五对等位基因自由组合。则杂交组合AaBBCcDDEe×AaBbCCddEe产

题型:选择题

问题:

假定五对等位基因自由组合。则杂交组合AaBBCcDDEe×AaBbCCddEe产生的子代中,有一对等位基因杂合、四对等位基因纯合的个体所占的比率是[ ]

A.1/32

B.1/16

C.1/8

D.1/4

考点:自由组合定律纯合子含义及其比例
题型:选择题
In the modern world, advertising   1    everywhere! Some people think that ads are great. Others hate ads,     2    that they make our cities and countryside 3    ugly.
Many ads are aimed  specifically    4    teenagers, and some young people   5      more than 100 advertisements a day. It’s true that some ads can be very useful. For instance, they can help you to  compare  two different products    6      you can buy the one you really need. They can also help you    7         money. When prices   8      , you can go to the store with the     9           price. Ads also tell you when stores   10    sales.     11      , some advertising  can be  confusing or misleading.    12      the words sound    13         but don’t   really  tell you anything about the quality of the product. At other times, the picture in an ad  looks  a  lot   14       than the real thing.  At times an ad can lead you  15      something  you  don’t  need  at all.
小题1:
A. isB.areC. wasD.were
小题2:A,  say             B. saying       C. to say         D. said
小题3:
A.lookingB.lookedC.lookD.to look
小题4:
A.inB.forC.onD.at
小题5:
A. seeB.to seeC.seeingD.saw
小题6:
A. in order toB. so thatC.such thatD.that
小题7:
A. savingB. savedC.saveD.saves
小题8:
A. listB.listedC.are listingD.are listed
小题9:
A. lowestB.lowC.lowerD.lowly
小题10:
A.haveB.are havingC.hasD.had
小题11:
A. AndB.SoC.HoweverD.But
小题12:
A. Some timeB.Some timesC. Some timeD.Sometimes
小题13:
A.goodB.wellC.badD.badly
小题14:
A.goodB.betterC.wellD.best
小题15:
A.buyB.buysC.to buyD.bought
题型:选择题

男性,37岁。因尿毒症行肾移植术,开放移植肾血流后立即泌尿。术后第一个24小时尿量为10000ml,术后第3天血肌酐将至150μmol/L,常规口服抗排斥药物CsA、MMF和Pred。

服药后多少天应检测其CsA浓度()。

A.服药后立即

B.服药后1天

C.服药后2天

D.服药后3天

E.服药后10天

题型:选择题

下列程序段的执行结果为
a=6
For k=1 To 0
  a=a+k
Next
Print k;a

A.-1 6

B.-1 16

C.1 6

D.11 21

题型:选择题

水泥混凝土的砂石比为0.59,那么其砂率为( )。

A.2.69

B.1.69

C.0.73

D.0.37

题型:选择题

美国印第安人事务局将在Navajo保留地翻修一所小学的项目外包给了你的公司。一个合同小组要求你雇拥当地的美国劳工保留地的承包商。这是以下哪种限制条件()

A、社会的

B、经济的

C、环境的

D、法律的

更多题库