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【简答题】
读某地地质剖面示意图（9分） （1）写出图中甲、的地质构造类型：甲 ，丁 ，丙处物质主要是由于 作用（填外力作用形式）而形成的。 （2）如果在该地区进行钻井，可能在 地找到石油、天然气，在 地找到地下水。 （3）在甲、采煤，最容易发生的矿难事故分别是(    )（选择填空） A．瓦斯爆炸和透水事故 B．井喷事故和瓦斯爆炸 C．透水事故和瓦斯爆炸 D．透水事故和井喷事故 （4）有一条东西向的河流，该地区计划在此处修建一座水库，你认为合适吗？简述你的理由。
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举一反三
【判断题】从 结合类型来看,硅是典型的 原子 晶体, NaCl是 分子 晶体。
A.
正确
B.
错误
查看完整题目与答案
【单选题】工厂车间变电所单台主变压器的容量一般不宜超过( )。
A.
1000kV.A(或1250kV.A)
B.
630kV.A
C.
800kV.A
D.
2000kV.A
查看完整题目与答案
【单选题】下列地基加固方法中属换填法的是( )。
A.
爆破排淤法
B.
化学加固法
C.
砂井预压法
D.
反压护道法
查看完整题目与答案
【多选题】Why do we think that the ribosome is a ribozyme?
A.
The rRNAs are folded into highly compact, precise three-dimensional structures that form the core of the ribosome. In contrast to the central positioning of the rRNAs, the ribosomal proteins are generally located on the surface, where they fill the gaps and crevices of the folded RN
B.
The main role of the ribosomal proteins seems to be to help fold and stabilize the RNA core, while permitting the changes in rRNA conformation that are necessary for this RNA to catalyze efficient protein synthesis.
C.
Not only are the three tRNA-binding sites (the A, P, and E sites) on the ribosome formed primarily by the rRNAs, but the catalytic site for peptide bond formation is formed by the 23S rRNA of the large subunit; the nearest ribosomal protein is located too far away to make contact with the incoming amino acid or with the growing polypeptide chain.
D.
The catalytic site in this RNA—a peptidyl transferase—is similar in many respects to that found in some protein enzymes: it is a highly structured pocket that precisely orients the two reactants—the elongating polypeptide and the amino acid carried by the incoming tRNA—thereby greatly increasing the likelihood of a productive reaction.
查看完整题目与答案
【单选题】Recently, I bought a new apartment(公寓), _______ was high.
A.
which price
B.
the price of which
C.
its price
D.
the price of whose
查看完整题目与答案
【简答题】where does it's name come from? Coronaviruses are large group of _____, they consist of core of genetic material surrounded by an envelope of proteins spikes. This gives it the _____ of crown. Crown i...
查看完整题目与答案
【单选题】配电所一般为户内型，单台变压器容量不宜超过( )，一般为2台，进线两回。
A.
600kV?A
B.
620kV?A
C.
630kV?A
D.
650kV?A
查看完整题目与答案
【判断题】对于临时来访的来宾,秘书也应该“有求必应”。
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下对于大隐静脉高位结扎、曲张静脉剥脱术后的护理中不正确的是
A.
保持敷料清洁
B.
卧床1周
C.
术后12天拆线
D.
抬高患肢
E.
患肢加压包扎
查看完整题目与答案
【简答题】配电所一般为户内型，单台变压器容量不宜超过（ ），一般为2台，进线两回。
查看完整题目与答案
相关题目：
【判断题】从 结合类型来看,硅是典型的 原子 晶体, NaCl是 分子 晶体。
A.
正确
B.
错误
查看完整题目与答案
【单选题】工厂车间变电所单台主变压器的容量一般不宜超过( )。
A.
1000kV.A(或1250kV.A)
B.
630kV.A
C.
800kV.A
D.
2000kV.A
查看完整题目与答案
【单选题】下列地基加固方法中属换填法的是( )。
A.
爆破排淤法
B.
化学加固法
C.
砂井预压法
D.
反压护道法
查看完整题目与答案
【多选题】Why do we think that the ribosome is a ribozyme?
A.
The rRNAs are folded into highly compact, precise three-dimensional structures that form the core of the ribosome. In contrast to the central positioning of the rRNAs, the ribosomal proteins are generally located on the surface, where they fill the gaps and crevices of the folded RN
B.
The main role of the ribosomal proteins seems to be to help fold and stabilize the RNA core, while permitting the changes in rRNA conformation that are necessary for this RNA to catalyze efficient protein synthesis.
C.
Not only are the three tRNA-binding sites (the A, P, and E sites) on the ribosome formed primarily by the rRNAs, but the catalytic site for peptide bond formation is formed by the 23S rRNA of the large subunit; the nearest ribosomal protein is located too far away to make contact with the incoming amino acid or with the growing polypeptide chain.
D.
The catalytic site in this RNA—a peptidyl transferase—is similar in many respects to that found in some protein enzymes: it is a highly structured pocket that precisely orients the two reactants—the elongating polypeptide and the amino acid carried by the incoming tRNA—thereby greatly increasing the likelihood of a productive reaction.
查看完整题目与答案
【单选题】Recently, I bought a new apartment(公寓), _______ was high.
A.
which price
B.
the price of which
C.
its price
D.
the price of whose
查看完整题目与答案
【简答题】where does it's name come from? Coronaviruses are large group of _____, they consist of core of genetic material surrounded by an envelope of proteins spikes. This gives it the _____ of crown. Crown i...
查看完整题目与答案
【单选题】配电所一般为户内型，单台变压器容量不宜超过( )，一般为2台，进线两回。
A.
600kV?A
B.
620kV?A
C.
630kV?A
D.
650kV?A
查看完整题目与答案
【判断题】对于临时来访的来宾,秘书也应该“有求必应”。
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下对于大隐静脉高位结扎、曲张静脉剥脱术后的护理中不正确的是
A.
保持敷料清洁
B.
卧床1周
C.
术后12天拆线
D.
抬高患肢
E.
患肢加压包扎
查看完整题目与答案
【简答题】配电所一般为户内型，单台变压器容量不宜超过（ ），一般为2台，进线两回。
查看完整题目与答案