皮皮学，免费搜题
登录
搜题
【单选题】
已知【图片】,且极限【图片】存在，则（ ）A.
函数f(x)在x=0处可导
B.
函数f(x)在x=0处不可导
C.
函数f(x)在x=0处不连续
D.
以上结论都不对
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】All I suggest is that we ________electric wires out of the reach of children.
A.
keep
B.
to keep
C.
kept
D.
be kept
【单选题】What is not mentioned as a proper way to keep the electric wires?
A.
They should be kept clean.
B.
They should be kept dry.
C.
They should be in sufficient length.
D.
They should not be overloaded.
【简答题】In an electric lamp there should not be any oxygen in which the wires may burn away.
【单选题】Electric Wires should have each feature of the following except ____.
A.
flame retardant
B.
moisture resistant
C.
oil resistant
D.
low conductivity
【简答题】In terms of conductivity, aluminum is a good material for electric wires.
【单选题】Electric wires in your house are ___________ with poor conductors like rubber or silk.
A.
segregated
B.
insulated
C.
isolated
D.
served
【单选题】The electric wires in a house____with some kind of insulation.
A.
are covered
B.
were covered
C.
is covered
D.
will been covered
相关题目：