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主导产业由劳动密集型产业向资本密集型产业、技术知识密集型产业依次演进属于产业升级的一种方式( ) A. 正确 B. 错误A.
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举一反三
【单选题】According to the study led by Mr. Newchurch, which of the following statements is TRUE?
A.
The ozone layer was increasing by 8 percent every 10 years since the late 1970s.
B.
In the past few years, the decrease rate of the ozone has been steady.
C.
The atmosphere is beginning to gain ozone now.
D.
We'll have a full recovery of ozone in 50 years if the Montreal Protocol is well observed.
【多选题】患者男性，16岁，主诉发热头痛半个月，右小腿胀痛20天，X线片示右小腿软组织肿胀，内有网状阴影，层次不清，胫骨上端骨质疏松，骨小梁模糊，似有斑点状透亮区。关于急性化脓性骨髓炎下列叙述正确的是（）
A.
绝大多数是经血源性感染的
B.
婴幼儿和儿童的骨髓炎发病较慢，全身中毒症状轻
C.
婴幼儿和儿童的骨髓炎容易造成软骨或大块骨坏死，骨生长障碍，干骺早期闭合和骨发育畸形
D.
成人化脓性骨髓炎无明显症状，预后较好
E.
化脓性骨髓炎哪里有骨膜下脓肿，哪里就将发生骨质破坏
F.
骨质增生常较轻微，表现为骨破坏周围密度增高
【单选题】Which is NOT true about the study?
A.
There are 20 patients involved in the study.
B.
The patients have used several anti-HIV drugs.
C.
The patients have been treated for up to 18 months.
D.
16 patients did not go through the whole study.
【单选题】关于对数周期天线,下列叙述正确的是:【】
A.
对数周期天线主辐射方向指向短振子一端
B.
对数周期天线的集合线上的电流为驻波电流
C.
对数周期天线是一种窄带天线
D.
对数周期天线呈现相同性能的周期为比例因子 τ
【多选题】患者，男，16岁，主诉发热头痛半月，右小腿胀痛20天，X线片示右小腿软组织肿胀，内有网状阴影，层次不清，胫骨上端骨质疏松，骨小梁模糊，似有斑点状透亮区。关于急性化脓性骨髓炎下列叙述正确的是（）
A.
绝大多数是经血源性感染的
B.
婴幼儿和儿童的骨髓炎发病较慢，全身中毒症状轻
C.
婴幼儿和儿童的骨髓炎容易造成软骨或大块骨坏死，骨生长障碍，干骺端早期闭合和骨发育畸形
D.
成人化脓性骨髓炎无明显症状，预后较好
E.
化脓性骨髓炎哪里有骨膜下脓肿，哪里就将发生骨质破坏
F.
骨质增生常较轻微，表现为骨破坏周围密度增高
【单选题】What is TRUE about the politeness study discussed in the passage?
A.
The study was reported in many cities of the world.
B.
New York was the most suitable city for the experiment.
C.
Sixty tests were designed to see if people are polite to each other.
D.
Experiments were performed to see if common good manners exist.
【单选题】Which of the following is NOT true of the study as mentioned in Para. 2?
A.
The study is based on a small sampling.
B.
Some students participated in the study.
C.
The result of the study is somewhat surprising.
D.
The study is probably well funded.
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