Our school has a big library.It has many books on different subjects. Students can read books and newspapers in the __21__ room. They can also borrow books from the library. But they the desk when Amy hurried in. She told Miss Susan that she couldn't find the library book " Harry Potter "__24__. At that moment, Lucy came into the library with Amy's book. She found it in the classroom. Amy was very __25__. She thanked Lucy and said that she would be more careful from then on.
21.
A.reading
B.return
C.happy
D.anywhere
E.kind
22.
A.reading
B.return
C.happy
D.anywhere
E.kind
23.
A.reading
B.return
C.happy
D.anywhere
E.kind
24.
A.reading
B.return
C.happy
D.anywhere
E.kind
25.
A.reading
B.return
C.happy
D.anywhere
E.kind
第1题:
A. has; seen
B. has; see
C. had; seen
第2题:
A.Has-arelationshipsshouldneverbeencapsulated.
B.Has-arelationshipsshouldbeimplementedusinginheritance.
C.Has-arelationshipscanbeimplementedusinginstancevariables.
D.Is-arelationshipscanbeimplementedusingtheextendskeyword.
E.Is-arelationshipscanbeimplementedusingtheimplementskeyword.
F.Anarrayoracollectioncanbeusedtoimplementaone-to-manyhas-arelationship.
G.TherelationshipbetweenMovieandActressisanexampleofanis-arelationship.
第3题:
第4题:
A、is, to translate
B、has, to translate
C、is, in translating
D、has, in translating
第5题:
When William hurried home, he found that his mother ____already ____to hospital.
A、has; been sent
B、had; sent
C、has; sent
D、had; been sent
第6题:
将students中的列变量重新命名为: (1)id_number, name, gender, score, has_graduate (2)选出Bob的性别gender,并存入变量bob_gender (3)选出列has_graduate,并存入向量status (4)创建数据框part_df,其中包含前三个学生的所有信息 (5)创建数据框rest_df,包含其余学生的所有信息