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【單選題】
普通小麥中有高桿抗病和矮桿易感病兩個品種，控制兩對相對性狀的基因分別位于兩對同源染色體上。現用顯性純合子高稈抗病小麥和矮稈易感病小麥雜交得F1，F1自交或測交，預期結果不正確的是（ ）
A.
自交結果中高稈抗病與矮稈抗病比例為9：1
B.
自交結果中高稈與矮稈比例為3：1，抗病與易感病比例為3：l
C.
測交結果為矮稈抗病：矮稈易感病：高稈抗病：高稈易感病比例為l：l：l：l
D.
自交和測交后代出現四種相同表現型
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【單選題】Where can you find a gift idea to improve your mother’s sleep?
A.
In Gift No. 1.
B.
In Gift No. 2.
C.
In Gift No. 3.
D.
In Gift No. 4.
【單選題】The underlined expression cutting edge in Paragraph 3 is closest in meaning to ______.
A.
advanced technique
B.
sharpening tool
C.
effective rule
D.
dividing line
【單選題】Buying gifts from Presents for Purpose allows mothers to________.
A.
enjoy good sleep
B.
give others help
C.
get extra support
D.
be well-organized
【單選題】What are you advised to do for your mother at doctor's visits?
A.
Be with her.
B.
Buy medicine.
C.
Take notes.
D.
Give her gifts.
【單選題】Why was Jennifer watched in an online exam?
A.
To correct her typing mistakes.
B.
To find her secrets in the room.
C.
To pr her form slowing down.
D.
To keep her from dishonest behaviors.
相關題目：
【單選題】Where can you find a gift idea to improve your mother’s sleep?
A.
In Gift No. 1.
B.
In Gift No. 2.
C.
In Gift No. 3.
D.
In Gift No. 4.
【單選題】The underlined expression cutting edge in Paragraph 3 is closest in meaning to ______.
A.
advanced technique
B.
sharpening tool
C.
effective rule
D.
dividing line
【單選題】Buying gifts from Presents for Purpose allows mothers to________.
A.
enjoy good sleep
B.
give others help
C.
get extra support
D.
be well-organized
【單選題】What are you advised to do for your mother at doctor's visits?
A.
Be with her.
B.
Buy medicine.
C.
Take notes.
D.
Give her gifts.
【單選題】Why was Jennifer watched in an online exam?
A.
To correct her typing mistakes.
B.
To find her secrets in the room.
C.
To pr her form slowing down.
D.
To keep her from dishonest behaviors.
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