皮皮学，免费搜题
登录
搜题
【单选题】
贴片电阻阻值是用3位数码表示,如果贴片电阻上标有R68,表示A.
电阻68Ω
B.
型号是R68
C.
阻值是0.68Ω
D.
阻值是6.8Ω
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Algae(水藻) are very plants. They grow in fresh water or salty water. Seaweed is algae that grow in salty water. Seaweed is red or brown in color. The Japanese people use these plants from the se...
【单选题】Historically algae has been used as food for people in coastal populations, but some species of ________ are now being grown commercially for food use. Sushi wrappers may be made from this algae.
A.
green algae
B.
dinoflagellates
C.
red algae
D.
stoneworts
E.
euglenophytes
【单选题】Researchers find it difficult to make algae produce hydrogen efficiently because __________. 查看材料
A.
removing the sulfate slows down hydrogen production
B.
it is hard to create an airfree environment
C.
it is expensive to remove the sulfate from the environment
D.
the algae's cells work slowly if there is no oxygen in the air
【单选题】No unicellular or colonial representatives of the _______________ algae have been found to date.
A.
green algae
B.
diatoms
C.
brown algae
D.
dinoflagellates
E.
euglenoids
【单选题】We can infer from the last two paragraphs that _________.
A.
public relations play an important role in the entertainment industry
B.
all practitioners in public relations are good at persuasion
C.
public relations are only popular in advanced countries
D.
public relations have not been heard of in developing countries
【简答题】Algae(水藻) are very plants. They grow in fresh water or salty water. Seaweed is algae that grow in salty water. Most seaweed is red or brown in color. The Japanese people use this plant from th...
相关题目：