A: mitochondria.
B: chloroplast.
C: lysosome.
D: vacuole.
举一反三
- A lysosome is a membrane-bound organelle found in nearly all animal cells. They are spherical vesicles which contain hydrolytic enzymes that can break down many kinds of biomolecules.
- There are two basic ways of harnessing solar energy: firstly, by converting it directly into _____ energy to heat water; and secondly, by converting it into electricity.
- The production process of thermal power plant is to convert () of fuel into electric energy. A: chemical energy B: heat energy C: mechanical energy D: kinetic energy
- Enzymes speed up chemcial reactions by... A: lowering activation energy. B: increasing the activation energy needed. C: breaking the chemical energy needed. D: stopping the chemical reaction.
- 1. From the perspective of major energy use, the era of modern society can be called A: Information age. B: Nuclear age. C: The era of petroleum. D: Solar energy era.
内容
- 0
If controlled slowly release in the nuclear fission reaction the nuclear energy can be transferred to . A: wind energy B: solar energy C: electricity D: --
- 1
______ is an energy form found in nature that has not been subjected to any human engineered conversion process. It is energy contained in raw fuels, and other forms of energy received as input to a system.( ) A: Premium energy B: Primary energy C: Principal energy D: Preliminary energy
- 2
The ______cell can convert the energy of sunlight into electric energy.
- 3
He _____ on the use of solar energy and advocated using clean energy. A: discussed B: lectured C: quarreled D: argued
- 4
单选题 ( 2.0 分 )<br/>Which of the following statements is true according to the<br/>passage? A: Nuclear power is a safe and reliable energy source. B: solar energy is always available as a source of energy. C: Water and steam energy has been successfully used in some<br/>countries. D: The real solution to energy crisis lies in natural sources of<br/>energy.