A. been exposed to
B. exposed to
C. been exposed on
D. exposed on
第1题:
There was no use ____ a dam where there was no water.
A: to build
B: build
C: to building
D: building
第2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3题:
第4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5题:
Software Engineering is best described as ( ).
A.the practice of designing, building, and maintaining off-the-shelf software from prefabricated parts
B.the practice of designing, building, and maintaining ad-hoc software without the use of formal methods
C.the practice of designing, building, and maintaining reliable and cost-effective software using standard techniques
D.the practice of designing, building, and maintaining fast and flexible software specifically for engineering applications
第6题:
用vi打开一个文件,如何用字母”new”来代替文件中所有的字母”old”
A.:r/old/new
B.:s/old/new
C.:1,$s/old/new/g
D.:%s/old/new/g