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【多选题】
石英晶体的压电效应与其内部结构有关,施加一定机械,它呈现出带电现象,那么者可能在( )方向加力。
A.
光轴
B.
电轴
C.
机械轴
D.
横轴
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【简答题】Genes (9) in determining performance, but they're not everything.
【单选题】下列过程满足 体系熵变大于零 ,环境熵变等于零 的是:
A.
恒温恒压 (273 K , 101325 Pa) 下, 1mol 的冰在空气升华为水蒸气 ;
B.
氮气与氧气的混合气体可逆绝热膨胀 ;
C.
理想气体自由膨胀;
D.
绝热条件下化学反应 。
【简答题】tissue-specific genes(luxury genes)
【单选题】Some genes in child-mother pairs will be unique to the mother in that
A.
these genes haven't been passed to the child.
B.
less than half of the genes have been passed to the child.
C.
these genes come from the father.
D.
the child is not willing to inherit these genes.
【单选题】Hox genes that are expressed more anteriorly comprise Hox genes
A.
with lower numbers, such as Hoxa1.
B.
with higher numbers, such as Hoxa13
C.
with all possible numbers and letters, since there is no system tic relationship between the gene designations and the expression patterns of the Hox genes
D.
with letters, so that anterior genes are Hoxa1-13, and posterior genes are Hoxp1-13
【单选题】What does Sidney Pierce say about genes from an alga?
A.
They are stolen from animals like the sea slug.
B.
They can't function unless exposed to sunlight.
C.
They don't usually function inside animals cells.
D.
They can readily be converted to sea slug genes.
【单选题】捏的方法一般是用拇指和 ( )操作,方法灵活多变。
A.
中指
B.
食指
C.
无名指
D.
小指
【单选题】【B9】
A.
nature
B.
evolution
C.
technology
D.
genes
【单选题】Hox genes that are expressed more anteriorly comprise Hox genes
A.
with all possible numbers and letters, since there is no system tic relationship between the gene designations and the expression patterns of the Hox genes
B.
with higher numbers, such as Hoxa13
C.
with letters, so that anterior genes are Hoxa1-13 , and posterior genes are Hoxp1-13
D.
with lower numbers, such as Hoxa1 .
【判断题】理想气体绝热自由膨胀的熵变等于零。
A.
正确
B.
错误
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