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【单选题】
以下度数适合配戴塑的是( )A.
-0.50/-3.00*180
B.
-3.00/-1.50*5
C.
+3.00
D.
-7.00/-0.50*180
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皮皮学刷刷变学霸
举一反三
【简答题】试判断下列函数的可微性和解析性： (1)f(z)=xy2+ix2y； (2)f(z)=x2+iy2； (3)f(z)=2x3+3iy3； (4)f(z)=x2一3xy2+i(3x2y—y3)．
【判断题】According the previous introduction of BEC-Preliminary Test, There are 45 questions in each part of the test.
A.
正确
B.
错误
【单选题】(Watch the video 00:00-05:45)In the introduction, the teacher wrote several phrases on the blackboard. What could be the possible reasons for the teacher to do so?
A.
She may want to help students solv e problems.
B.
She may want to introduce language .
C.
She may want to do b rainstorming with students.
D.
She may want to help students better u nderstand the problem .
【简答题】试判断函数 的可微性和解析性 .
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