鼠的毛色类型由遗传因子B、b控制,甲、乙黑毛雌鼠分别与褐毛雄鼠丙交配,甲3胎共生出9只黑毛幼鼠和7只褐毛幼鼠,乙3胎共生出19只黑毛幼鼠,则甲、乙、丙3只鼠的遗传因子依次可能为A.BB、Bb、bb B.bb、Bb、BB C.Bb、BB、bb D.Bb、bb、BB
Tina is very____.Her face often turns red while answering questions in class.( )
A.shyB.activeC.smartD.outgoing
Would you like something to drink, Mum?
Yes, I'd like a cup of coffee ________ nothing in it.( )
A.withB.withoutC.forD.to
Stephen Hawking's story gives me much __________ to face all kinds of difficulties.( )
A.chanceB.wealthC.courageD.decision
Wolf Warriors II is such ___ exciting film that I have seen it three times.( )
A.aB.anC.theD./
I wonder ________.
What about next Saturday?( )
A.what time does she go to work
B.when will you watch the movie
C.what time is his cousin leaving
D.when you can hang out with me