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【单选题】
酵母菌基因组结构最显著的特点是( )，其tRNA基因在每个染色体上至少是4个，多则30多个，总共约有250个拷贝。A.
高度重复
B.
操纵子结构
C.
短
D.
连续性
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反馈参考答案：
举一反三
【单选题】--What can we do to help John? --All we can do is to try that he ought to study more.
A.
makinghim to realize
B.
making him realize
C.
to make him realized
D.
to make him realize
【单选题】We can infer from the last paragraph that ______ .
A.
economic expansion is fast
B.
the business can expand endlessly
C.
the end of one business expansion will certainly happen
D.
economic rise to the peak is slow
【简答题】When can we do running? We can do it at _____________.
【单选题】— _____ we eat in the classroom? —Yes,we _____ . [ ]
A.
Do; do
B.
Can; do
C.
Do; can
D.
Can; can
【简答题】一个标有“ 220V 、 40W ”的灯泡,它在正常工作条件下的电阻是 __________ 欧姆 ,通过灯丝的电流是 _________ A 。
【单选题】下列关于创建内联表单的叙述错误的是()
A.
内联表单中所有的元素都处于同一行中
B.
把每组标签和控件放在一个带有.form-inline类的div中
C.
为form标签添加.form-inline类
D.
为所有的文本元素添加.form-control类
【单选题】— What _______ we do in summer? — We _______ swim in the river. [ ]
A.
am, do
B.
do, do
C.
can, can
D.
can, do
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