A.are to challenge
B.have challenged
C.are challenging
D.have been challenged
A.is broken
B.has broken
C.was broken
D.would break
开始考试点击查看答案A.has done
B.would do
C.had done
D.will do
开始考试点击查看答案A.have contributed;on
B.had contributed;to
C.contributed;at
D.contributes;for
开始考试点击查看答案A.is
B.are
C.is to be
D.are to be
开始考试点击查看答案A.is paid back
B.have been paid off
C.has been paid off
D.are paid off
开始考试点击查看答案A.doesn't fit
B.isn't fit for
C.doesn't suit
D.isn't suited for
开始考试点击查看答案A.remain
B.remains
C.are remained
D.is remained
开始考试点击查看答案A.have been doing
B.did
C.do
D.had done
开始考试点击查看答案A.make
B.makes
C.was making
D.were making
开始考试点击查看答案A.He ________ at Stanford University then. A.studied
B.had studied
C.is studying
D.was studying
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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