1.简单
What are the building blocks of carbohydrates such as starch?
- AMonosaccharides (simple sugars) such as glucose
- BFatty acids joined to a glycerol molecule
- CNucleotides
- DAmino acids
2.简单
What is a single covalent bond?
- AOne electron transferred from one atom to another
- BThe attraction between two oppositely charged ions
- CTwo pairs of electrons shared between two atoms
- DOne pair of electrons shared between two atoms
3.简单
什么是同位素?
- A中子数不同的同一元素的原子
- B中子数相同的不同元素的原子
- C质子数不同的同一元素的原子
- D得到了电子的离子
4.中等
Which of these is a colloid?
- APure water
- BSand in water
- CMilk
- DSalt water
5.中等
Zn + 2HCl → ZnCl₂ + H₂ 是哪种类型的反应?
- A置换反应
- B合成反应
- C分解反应
- D复分解反应
6.中等
Which list is in order from smallest to largest mass?
- AMilligram, gram, kilogram
- BKilogram, gram, milligram
- CMilligram, kilogram, gram
- DGram, milligram, kilogram
7.困难
哪个列表按原子半径递增的顺序排列元素?
- ANa, Mg, Al, Si
- BO, F, N, C
- CC, N, O, F
- DF, O, N, C
8.困难
Under which conditions does a real gas behave least like an ideal gas?
- ALow pressure and low volume of particles
- BHigh temperature and large container
- CHigh pressure and low temperature
- DLow pressure and high temperature
答案
- 1. A · Monosaccharides (simple sugars) such as glucose
- 2. D · One pair of electrons shared between two atoms
- 3. A · 中子数不同的同一元素的原子
- 4. C · Milk
- 5. A · 置换反应
- 6. A · Milligram, gram, kilogram
- 7. D · F, O, N, C
- 8. C · High pressure and low temperature
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