Part A
Directions:
You heard that one of your friends has been accepted by a foreign university. Write a letter of congratulations including (1) your congratulations; (2) some advice; (3) reminding him to keep in touch with you. You should write about 100 words. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You do not need to write the address.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
第1题:
A、are…being
B、is…being
C、has…been
D、have…been
第2题:
A.you…your
B.you…our
C.us…our
D.us…your
第3题:
( ) – Is Miss White __________ English teacher, Maria?
– No, she teaches __________ geography.
A.your;my
B.you;mine
C.you;us
D.your;us
第4题:
What's ( )job? Are ( ) British?
A. your, your
B. you, your
C. your, you
第5题:
Given the following DDL for the PARTS table:CREATE TABLE parts (part_no INT(9) NOT NULL, part_name VARCHAR(24), part_remain INT(9));All part numbers entered will be different and all rows should be displayed in order of increasing part numbers whenever the table is queried. Which of the following create index statements will meet this criteria and require the least amount of storage for the index object?()
A.CREATE UNIQUE INDEX idx_partno ON parts(part_no)
B.CREATE UNIQUE INDEX idx_partno ON parts(part_name ASC)
C.CREATE UNIQUE INDEX idx_partno ON parts(part_name, part_no ASC)
D.CREATE UNIQUE INDEX idx_partno ON parts(part_no, part_name ASC)
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