皮皮学，免费搜题
登录
搜题
【判断题】
典型雷电冲击电压波形的波前时间和半峰值时间通常统称为波形参数。( )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】Some scientists believe that hibernation is started by______.
A.
a lack of food
B.
calcium deposits
C.
a body chemical
D.
a lack of water
【简答题】Scientists resist talking about their options because they don't want people to
【单选题】After collecting the last Martian dust particle，the scientists have started to build up a portrail gallery of it．
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Scientists started to______the Anartica in the 19th century.
A.
explode
B.
explore
C.
expose
D.
expand
【单选题】Scientists don’t think that a warm winter always has a negative influence on our life,____?
A.
don’t they
B.
do they
C.
hasn’t it
D.
has it
相关题目：