A.is working
B.works
C.work
D.worked
A.knows
B.know
C.have known
D.knew
开始考试点击查看答案A.were
B.was
C.is
D.are
开始考试点击查看答案A.is
B.was
C.has been
D.had been.
开始考试点击查看答案A.I are
B.I am
C.as I am
D.as I are
开始考试点击查看答案A.two fifth; is
B.two fifths; are
C.two fifths; is
D.two fifths; are
开始考试点击查看答案A.has been needed; produces
B.are needed; produces
C.is needed; produce
D.have been needed; produce
开始考试点击查看答案A.are needed
B.is needed
C.be needed
D.should need
开始考试点击查看答案A.added up, is
B.was; are
C.were; are
D.rose; is
开始考试点击查看答案A.a policeman was asked to help
B.the area was searched thoroughly
C.it was looked for everyone
D.she hurried to a policeman for help
开始考试点击查看答案A.are to answer
B.is to answer
C.are answered
D.is answered
开始考试点击查看答案高中数学代数与函数一数系的扩充与复数的引入36
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入28
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入29
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入30
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入31
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入32
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入33
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入34
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入35
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入26
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