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【单选题】
Which command is used to drop a constraint?A.
ALTER TABLE MODIFY CONSTRAINT
B.
DROP CONSTRAINT
C.
ALTER CONSTRAINT DROP
D.
ALTER TABLE DROP CONSTRAINT
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反馈参考答案：
举一反三
【单选题】设有如下程序段 x=2 For i=1 to 10 step 2 x=x+i Next 运行以上程序后, X的值是____。
A.
36
B.
38
C.
27
D.
57
【单选题】设有如下程序段 x=2 For i=1 to 10 step 2 x=x+i Next 运行以上程序后 , X 的值是 ____ 。
A.
36
B.
27
C.
38
D.
57
【单选题】设有如下程序段: x = 2 For i = 1 To 10 Step 2 x = x + i Next 运行以上程序后, x 的值是( )。
A.
36
B.
27
C.
38
D.
57
【单选题】设有如下程序段: x = 2 For i = 1 To 10 Step 2 x = x + i Next 运行以上程序后,x的值是( )。
A.
57
B.
36
C.
38
D.
27
【单选题】---I don't know____ during the summer vacation. Do you have any advice? ---How about visiting Beijing International Horticultural Expo(北京国际园艺博览会)
A.
what should I do
B.
when should I go
C.
what I should do
D.
when I should go
【简答题】I really enjoyed my vacation last summer to Sanya! I ( play ) ________ in the sea while the sun ( shine ) ________ .
【单选题】You look very well. You ______your summer vacation.
A.
must have enjoyed
B.
could enjoy
C.
would enjoy
D.
will have enjoyed
【单选题】Choose the complete sentence.
A.
The most beautiful cities are in New England.
B.
Being on vacation in the best city in the world.
C.
Many interesting places to visit this summer.
【简答题】--Which is the city ____ you visited this summer vacation? -Xi’an. It is the city ____ I spent my childhood.
相关题目：
【单选题】设有如下程序段: x = 2 For i = 1 To 10 Step 2 x = x + i Next 运行以上程序后, x 的值是( )。
A.
36
B.
27
C.
38
D.
57
参考解析：
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