题目:
下列运算中,正确的是( )
|
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0415/a285f666ba0bcb400d7460e14d248c9b.html
下面是错误答案,用来干扰机器的。
答案:B题目分析:①在欧洲开辟第二战场是德黑兰会议的决定,④日本应无条件投降是波茨坦会议的决定,因此①④可以排除。
下列运算中,正确的是( )
|
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0415/a285f666ba0bcb400d7460e14d248c9b.html
下面是错误答案,用来干扰机器的。
答案:B题目分析:①在欧洲开辟第二战场是德黑兰会议的决定,④日本应无条件投降是波茨坦会议的决定,因此①④可以排除。
物流反应快速化体现在()的能力在加强。
A.快速化决策
B.及时配送
C.快速补充订货
D.迅速调整库存结构
女性,45岁,咳嗽气促半月余,入院查肺功能VC%为80%,FEV1.0/FVC%为78%,MVV为75%,RV/TLC%为30%,VC25%及VC50%均为60%,TLC为4000ml,最可能的是()
A.阻塞性通气功能障碍
B.限制性通气功能障碍
C.混合性通气功能障碍
D.小气道功能受损
E.大气道功能受损
病历摘要:患者,男,12岁,腹部痛;大便检查结果:粘液便,隐血试验阳性、ERY(+)、WBC(+)、镜下可虫卵。
人体肠道内寄生,常见鞭毛虫有()。
A.结肠小袋纤毛虫
B.脆弱双核阿米巴原虫
C. * * 毛滴虫
D.人肠毛滴虫
E.蓝氏贾第鞭毛虫
阅读理解。
Scientists who discovered a new way of generating electricity from water say they may have come
across an alternative source of clean energy to rival wind and solar power.
The breakthrough, which scientists say is the first new way to generate electricity in 160 years, could
lead to batteries that use water instead of poisonous substances.
The scientists made the discovery when they were investigating what happens when tap water is
forced through extremely narrow glass tubes. Water squeezed down the tubes, each of which was
narrower than a tenth the thickness of a human hair, generating a small electric current that ran the length
of the tube. To produce a larger electric current, the team tried forcing water through a glass water filte
r(滤水器) that contained thousands of narrow channels lined up side by side. "When we took a syringe (注射器) of water and squeezed it through the filter, we got enough power to light a light bulb," said
Larry Kostiuk of the University of Alberta in Canada. "The harder you push the syringe, the more electric
current you get."
The current is produced because of an effect in the glass tubes. When they are filled with water,
positively charged ions (阳离子) fixed in the tubes are washed away, leaving a slight negative charge on
the glass surface. When water is then forced along the tube, the surface repels negatively charged ions in
the water while positively charged ions are attracted down the tube. The result is a net flow of positively
charged ions that sets up an electric current.
According to Dr Kostiuk, no one has ever thought to use water to produce electricity in this way.
"The last time someone came up with a way of generating electricity was Michael Faraday in 1839," he
said. "So this is the first new way of generating electricity in 160 years, which is why we are so excited
about it."
Dr Kostiuk says water batteries might one day be used to power mobile phones and calculators, but
admitted that the engineering challenges might make other applications more realistic. "You'd need to be
sure it wouldn't leak, and you'd need to make sure it wouldn't freeze," he said.
More likely would be to install the electricity-generating devices where water is already being pumped, such as at city water filtration sites, he said. "It could compete with wind and solar power," he added.
1. What does the passage mainly want to tell us about?
A. A kind of solar power discovered by scientists.
B. A kind of new energy source found in tap water.
C. The breakthrough to generate electricity 160 yeas ago.
D. A kind of new battery invented without poisonous substances.
2. The underlined word "repels" in Paragraph 4 is closest in meaning to _________.
A. rejects
B. identifies
C. attracts
D. rebels
3. Why were the scientists extremely happy about their new discovery?
A. They were the first to find a new way to produce electricity.
B. They could make an electric current to light a light bulb.
C. Their discovery could be used to invent water batteries.
D. Their discovery was made 160 years earlier than Faraday's.
4. What can we infer about potential water batteries?
A. They must be used to power mobile phones and calculators.
B. They have some possible disadvantages like water leaking.
C. They would be needed greatly at city water filtration sites.
D. They would be better than wind and solar power.
女,34岁,因原发性甲亢行甲状腺双侧次全切除术。有关术中操作,正确的是()
A.结扎切断甲状腺上动脉要远离甲状腺上极
B.结扎切断甲状腺下动脉要靠近甲状腺背面
C.切除腺体的70%~80%
D.止血后不必放引流
E.需保留腺体的背面部分