皮皮学,免费搜题
登录
搜题
【简答题】
Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big. And they can eat small animals. One famous meat-eating plant is the Venus flytrap(捕蝇草). The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly touches one of the hairs, the leaf closes quickly. The fly cannot get out. In about half an hour, the leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly. Why do plants do it? Most plants get what they need from the sun, the air, and the ground. In some places, the ground is very poor. It doesn't have all these important things, especially nitrogen(氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let's hope that some of the bigger plants don't get the same idea! 小题1:The Venus flytrap is a kind of _________. A.plant B.animal C.food D.meat 小题2:The underlined word 'presses' probably means _________ in Chinese. A.挤压 B.关上 C.打开 D.松开 小题3:Why do some plants eat animal meat? A.Because plants are dangerous to animals. B.Because animals are dangerous to plants. C.Because plants want to get what they need from animal meat. D.Because plants want to protect themselves against animals.
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】分析图 11 所示电路 74161 的 Q 3 为高电平时功能。 74194 功能表如表 1 所示。 74161 功能表如表 2 所示。
【单选题】不需借助其他软件,自身可进行解压缩的压缩文件,称为( )
A.
自压缩文
B.
自解压文件
C.
自加压文件
D.
自运行文件
【单选题】美洲斑潜蝇的防治关键期在幼虫2龄前,虫道小于( )。
A.
0.5C,m
B.
1C,m
C.
1.5C,m
D.
2C,m
【简答题】人类的性及性行为与动物的最大区别在于 性。
【单选题】不需借助其他软件,自身可进行解压缩的压缩文件,称为( ).
A.
自压缩文件
B.
自解压文件
C.
自加压文件
D.
自运行文件
【单选题】不需借助他其软件,自身可进行解压缩的压缩文件,称为()
A.
自压缩文件
B.
自解压文件
C.
自加压文件
D.
自运行文件
【判断题】“一带一路”在它整个线的走向中,新疆和广西是两个核心区域。() 判断对错
A.
正确
B.
错误
【简答题】下图所示电路中,74161为一个4位二进制加法计数器,74151为一个8选1数据选择器,74194为一个双向移位寄存器(最左边的输出为QA,最右边的输出为QD),S1S0 =00时,74194工作在保持状态;S1S0 =01时,74194工作在右移状态;S1S0 =10时,74194工作在左移状态;S1S0 =11时,74194工作在并行输入状态。如果输出R 、G 、Y 、B 分别连红、绿、黄、蓝...
【单选题】已知集成计数器74161的逻功能表如图所示。已知计数器的逻辑电路,请分析该电路是( )进制计数器。【图片】【图片】
A.
11
B.
12
C.
13
D.
10
E.
16
【单选题】人类的性及性行为与动物的最大区别在于
A.
社会性
B.
生物性
C.
性冲动
D.
生殖功能
相关题目: