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【单选题】
已知抛物线的准线方程是 x=- 1 2 ，则其标准方程是（ ）A.
x 2 =2y
B.
y 2 =2x
C.
x 2 =-2y
D.
y 2 =-2x
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【单选题】______ your Enquiry No.123, we are sending you a catalogue and a sample book for your reference.
A.
According
B.
As per
C.
As
D.
About
【单选题】Your enquiry letter has ____our careful attention.
A.
drawn
B.
brought
C.
received
D.
invited
【单选题】I could not have fulfilled the task in time if it ______ for your help.
A.
had been
B.
has been
C.
was not
D.
had not been
【简答题】Your
enquiry for cotton shirts has been referred to us for attention.A. 涉及 B. 查阅 C. 提交 D. 转交
【单选题】( )your Enquiry No. 123, we are sending you a catalog and a sample book for your reference.
A.
According
B.
As per
C.
As
D.
About
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