微分方程y'=2xy的通解是( ).
第1题
A.can’t
B.needn’t
C.may
D.must
第2题
When is the deadline of the application for the next semester?
A.It is two months from the end of this semester.
B.It can"t be later than two months before the semester begins.
C.It is at the beginning of the second month of the next semester.
D.It is at the end of the second month of this semester.
第3题
A.Better forget it.
B.Why not
C.It couldn’t be better
D.Good idea!
第4题
A.One month,
B.One month and a half.
C.Two months.
D.Two months and a hale
第5题
When was the last time this happened in the same area?
A.One month ago.
B.Two months ago.
C.Three months ago.
D.One year ago.
第6题
There are twelve ______ in a year.
A、month
B、months
C、monthes
D、month's
第7题
A.One month.
B.One month and a half.
C.Two months.
D.Two months and a half.
第8题
A、One month
B、Two months
C、Three months
D、Four months
第9题
If it is now June, what month will it be 400 months from now?
A.January
B.April
C.June
D.October
E.December
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