A. what B. which C. that D.it 相关知识点: 试题来源: 解析 3.C 【解析】考查定语从句的关系词。 句意:氧气是能助 燃的唯一气体吗?先行词为gas,指物,该空在从句中作 主语,不可省略,且先行词前有 the only 修饰,引导词只 能用 that 而不能用 which。 故选 C。 反馈 收藏 ...
Oxygen is a gaseous chemical element vital to respiration. Although pure oxygen is used medicinally, it can be dangerous when...
Is oxygen the only gas ___ helps fire burn?A that B / C which D what 相关知识点: 试题来源: 解析 A核心短语/词汇:help sb./ sth. (to) do sth. 帮助某人/某物做某事句子译文:氧气是唯一的助燃气体吗? 本题考查定语从句。___helps fire burn 用来修饰之前的名词gas, 该从句的引导词在定...
A.that B./ C.what D.it相关知识点: 试题来源: 解析 A 考查定语从句。Gas为先行词,在定从___ helps fire burn中作主语,且that作主语时不可省略。所以选A。 分析总结。 gas为先行词在定从helpsfireburn中作主语且that作主语时不可省略反馈 收藏 ...
What is the formula for oxygen hexafluoride? In what country was fluorine discovered? What is the formula for lithium nitride? What is sulfur hexafluoride's formula? What is beryllium chloride's formula? What is the chemical formula for air?
An oxygen compressor is a device that forces oxygen gas into a pressurized cylinder. There are many different uses for an oxygen...
The sulfate ion has a formula {eq}SO_4^{2-} {/eq}. The ion is composed of a central sulfur atom doubly bonded to two oxygen atoms and singly bonded... Learn more about this topic: Monatomic Ions | Definition, Types & Examples ...
When oxygen and aluminum form an ionic compound, what is the formula? What is the formula for sodium sulfate? Is this compound ionic or covalent? What is wrong with the following formula for an ionic compound? (NO3)2SO4 Give the formula for disulfur dibromide. Is this compound ioni...
Oxygen saturation levels (SpO2) between 95 to 100 percent are considered normal for both adults and children (below 95% is considered abnormal). People over 70 years of age may have oxygen levels closer to 95%.
An oxygen deficit is a type of condition in which there is a shortage of oxygen in an organism. The causes of oxygen deficit...