皮皮学，免费搜题
登录
搜题
【单选题】
下列关于CD-R光盘的描述中,错误的是A.
只能写入一次,可以反复读出的一次性写入光盘
B.
可多次擦除型光盘
C.
以用来存储大量用户数据的,一次性写入的光盘
D.
CD-RCompact Disc Recordable 的缩写
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：