1.选择题- (共3题)
3.对下列有关遗传和变异的说法评判正确的是:
①基因型为Dd的豌
豆在进行减数分裂时,产生的雌雄两种配子的数量比是1:1
②基因自由组合定律的实质是:在F1产生配子时,等位基因分离,非等位基因自由组合。
③遗传学上把信使RNA上相邻的三个碱基称之为一个密码子
④染色体中DNA脱氧核苷酸数量、种类和序列三者中有一个发生改变就会引起染色体变异。
①基因型为Dd的豌

②基因自由组合定律的实质是:在F1产生配子时,等位基因分离,非等位基因自由组合。
③遗传学上把信使RNA上相邻的三个碱基称之为一个密码子
④染色体中DNA脱氧核苷酸数量、种类和序列三者中有一个发生改变就会引起染色体变异。
2.单项选择- (共7题)
4.
The biggest whale is ________ blue whale,which grows to be about 29 meters long—the height of ________ 9story building.
A.the;the | B.a;a | C.a;the | D.the;a |
5.
______ twice, the postman refused to deliver our letters unless we chained our dog.
A.Being bitten | B.Bitten | C.Having bitten | D.To be bitten |
6.
For breakfast he only drinks juice from fresh fruit________on his own farm.
A.grown | B.being grown |
C.to ge grown | D.to grow |
7.
Scientists have many theories about how the universe into being.
A.came | B.was coming | C.had come | D.would come |
8.
When I talked with my grandma on the phone, she sounded weak, but by the time we ______ up , her voice had been full of life.
A.were hanging | B.had hung | C.hung | D.would hang |
9.
The way the guests ___ in the hotel influenced their evaluation of the service.
A.treated |
B.were treated |
C.would treat |
D.would be treated |
试卷分析
-
【1】题量占比
选择题:(3道)
单项选择:(7道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:7
7星难题:0
8星难题:0
9星难题:0