【判断题】生物由于遗传变异和自然选择形成不同的物种。()
【单选题】Dad is used to smoking and drinking. There's no chance ________ I'm able to talkhim into ________.
B.
of whether giving them up
C.
thatgetting rid of them
【单选题】Is there any spare room at the hotel?
A.
No, there's no spare room.
B.
Yes, there's a single room.
C.
Yes, there's a double room.
【单选题】The author thought there's no difference between those textbooks on American Government.
【简答题】科学家做过如下实验,将深色桦尺蛾和浅色桦尺蛾分别进行标记,然后放养于不同的地点,一段时间后,将所释放的桦尺蛾尽量收回,统计其数目,结果如下表: (1)桦尺蛾的体色有深浅之分,这是一种 现象(填“遗传”或“变异” )。假设深色由显性基因控制(用B表示),浅色由隐性基因控制(用b表示),那么深色蛾的基因组成可能是 或 。 (2)从表中可以看出,在不同环境中生活着的桦尺蛾,保护色是不同的。根据达尔文理论...
【简答题】Flying doesn't bother me as long as there's no turbulence. (mind) I don't ______________ as long as there's no turbulence.