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【简答题】
乳糖操纵子中具有调控功能的是( ) A．A基因 B．Z基因 C．O序列 D．P序列
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反馈参考答案：
举一反三
【单选题】某电路有3个节点和5条支路，则应用基尔霍夫定律可列出独立的节点电流方程和独立的回路电压方程个数为（ ）
A.
4 、 1
B.
2 、 3
C.
3 、 2
D.
4 、 5
【简答题】胶囊剂除外观性状外,还有哪些常见的质量检查项目?
【单选题】两家不同企业的甲车和乙车在行驶中楣撞。甲车车辆损失7000元，乙车车辆损失6000元。交通管理部门裁定在机动车交通事故责任强制保险责任限额范围内赔偿后，甲车负主要责任，承担经济损失70%，事故责任免赔率为15%；乙车负次要责任，承担经济损失30%，事故责任免赔率为5%。这两辆车都投保了车辆损失险（按新车购置价确定保险金额）和商业第三者责任险，且都是足额投保。保险人应赔偿甲车（），赔偿乙车（）（都不...
A.
2850元5950元
B.
3570元1140元
C.
5355元2565元
D.
1140元3570元
【单选题】A study of the studies available on this topic shows that
A.
ecotourism is not like other projects that earn money.
B.
the twin goals actually coincide with each other.
C.
the rule in the thinking about ecotourism is that the thinking is well put.
D.
later studies and reports may differ from earlier studies.
【单选题】The huge growth of global 'ecotourism' industry is becoming an increasing concern for conservationists with mounting evidence that many wild species do not respond well to contact with human beings. O...
A.
have tourists help in the conservation of wildlife
B.
have wild species respond well to contact with humans
C.
make wild species reduce stress and abnormal behavior
D.
make conservationists more concerned with wildlife
【单选题】Ecotourism is growing at a faster rate than any other type of travel.
A.
YES
B.
NO
C.
NOT GIVEN
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