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【判断题】
复等位基因的存在是由于基因突变的重演性引起的。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】She looked up his number in the phone book to ______ that she had got it right.
A.
make up her mind
B.
make up
C.
make a decision
D.
make sure
【单选题】She looked up for a moment, then _______ drawing.
A.
retired
B.
spent
C.
kept
D.
continued
【单选题】She looked up and this time she did not______, but gazed at him blankly, as if she didn't recognize him.
A.
turn down
B.
turn away
C.
turn up
D.
turn off
【单选题】She looked up and nodded for me ______..
A.
to come in
B.
coming in
C.
came in
D.
come in
【简答题】“Tell me what you were like when you were my age,” I asked my mother one afternoon. She looked up, 21 at my question. After a long time she answered, “I was 22 like you. Then, there was only one caree...
【简答题】When asked why she was late again for work she looked up, her mouth being __________ (tremble).
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