| In recent years a new farming
revolution has begun, one that involves the{{U}} (21) {{/U}}of life at a
fundamental level — the gene. The study of genetics has{{U}} (22)
{{/U}}a new industry called biotechnology. As the name suggests, it{{U}}
(23) {{/U}}biology and modem technology through such techniques as
genetic engineering. Some of the new biotech companies specialize{{U}} (24)
{{/U}}agriculture and are working feverishly to duplicate seeds that give a
high yield, that{{U}} (25) {{/U}}diseases, drought and frost, and that
reduce the need for{{U}} (26) {{/U}}chemicals.{{U}} (27)
{{/U}}such goals could be achieved, it would be most beneficial. But some have
raised concerns about genetically engineered crops. In nature, genetic diversity is created within certain space. A rose{{U}} (28) {{/U}}be crossed with a different ki A. may B. need C. can D. must [单选题]能作流行性乙型脑炎早期诊断的实验室检查是
A.补体结合试验 B.血凝抑制试验 C.中和试验 D.特异性IgM抗体检测 E.病毒分离 [单选题] 逆变器的负载主要是异步电动机,属于( )负载。
A.容性 B.感性 C.流性 D.线性 [多选题]现场摄像图传是消防人员使用( )等器材装备,对灭火战斗行动及与现场有关的其他情况进行现场摄像并利用图传设备实时向后方传输的工作。
A.照相机 B.摄像机 C.图传设备 D.手机 [单选题]成人学习的优势表现在( )。
A.学习目的明确、指向清楚 B.具有较强的自我控制、自我约束能力 C.有丰富的实践经验作基础和较强的学习能力 D.以上都是 [判断题]鼓风曝气系统曝气开始时应排放管路中的存水,并经常检查自动排水阀的可靠性。
A.正确 B.错误 [判断题]固态微型强光防爆电筒由灯头、壳体和灯尾等部件组成。 ( )
A.正确 B.错误 [判断题]国家综合性消防救援队伍干部的基本职责是服从命令,听从指挥,英勇顽强,不怕牺牲,坚决完成任务。( )
A.正确 B.错误 我来回答: 提交
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