皮皮学，免费搜题
登录
搜题
【判断题】
蚯蚓的循环系统属于闭管式循环A.
正确
B.
错误
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
【单选题】（ ）是利用半导体接触气体时，其阻值的改变来检测气体的成分或浓度。
A.
非电阻型半导体气敏传感器
B.
体控制型气敏传感器
C.
表面控制型气敏传感器
D.
电阻型半导体气敏传感器
【单选题】Huntington based his conclusions on ______.
A.
records of changes in his own intelligence
B.
work with peoples in different climates
C.
records of temperature changes
D.
all of the above
【单选题】Changes in the net working capital requirements
A.
can affect the cash flows of a project every year of the project's life
B.
only affect the initial cash flows of a project
C.
only affect the cash flow at time zero and the final year of a project
D.
are generally excluded from project analysis due to their irrelevance to the total project
【单选题】Which sentence best describes Jacky's Net life?
A.
He hates the Net.
B.
He will be at a loss when not sitting in front of the computer.
C.
He decides to spend less time on it.
D.
He likes everything on the internet.
相关题目：