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【多选题】
常见的危险密码是()A.
跟用户名相同的密码
B.
使用生日作为密码
C.
二种以上类型的字符组成的长密码
D.
123456或666666等有规律的密码
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】GPS卫星位置采用（）大地坐标系。
【单选题】The twins in Shanghai last week but now they in Hainan. [ ]
A.
are ; are
B.
were ; were
C.
were ; are
D.
are ; were
【单选题】The twins in Dalian last year. They here now. [ ]
A.
are; were
B.
were; are
C.
was; are
D.
were; was
【简答题】When the twins were three months old, their parents died, and they were placed in separate foster(抚养)homes.
【单选题】— Why was it so noisy over there? — The Twins were surrounded by their fans ____ they stepped out of the hall.
A.
until
B.
the moment
C.
in case
D.
so that
【单选题】Why study identical twins that were separated at birth?
A.
Yes,identical twins tend to be similar if they didn't grow up together.
B.
ldentical twins inherit the same genes.
C.
Twins feel close because they have a similar appearance.
D.
Studying them helps us understand biolgical influences.
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