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【单选题】
( )可以被用来终止本次循环语句的执行A.
break
B.
continue
C.
switch
D.
jump
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反馈参考答案：
举一反三
【单选题】已知⊙O 1 和⊙O 2 的半径是一元二次方程x 2 -5x+6=0的两根，若圆心距O 1 O 2 =5，则⊙O 1 和⊙O 2 的位置关系是（ ）
A.
外离
B.
外切
C.
相交
D.
内切
【判断题】Suzelle Poole now teaches at Royal Ballet Dance Academy and performs around the world.
A.
正确
B.
错误
【单选题】( )就是以物流系统为核心的以生产企业起点,经由物流企业、销售企业,直至消费者供应链的整体化和系统化。
A.
物流一体化
B.
物流联盟
C.
第三方物流
D.
自营物流
【简答题】阅读以下材料： 若关于x的三次方程x 3 +ax 2 +bx+c=0（a、b、c为整数）有整数解n，则将n代入方程x 3 +ax 2 +bx+c=0得：n 3 +an 2 +bn+c=0 ∴c=-n 3 -an 2 -bn=-n（n 2 +an+b） ∵a、b、n都是整数∴n 2 +an+b是整数∴n是c的因数． 上述过程说明：整数系数方程x 3 +ax 2 +bx+c=0的整数解n只能是常数项c...
【单选题】1 After graduating from high school in Michigan, Madonna received a dance scholarship to the University of Michigan School of Music, Theatre & Dance. After convincing her father to allow her to take b...
A.
He persuaded Madonna to pursue a career in dance.
B.
He recommended Madonna’s work to other people.
C.
He persuaded Madonna to go solo.
D.
He signed Madonna to his label.
【简答题】在一元二次方程x 2 +bx+c=0中，若系数b和c可在1，2，3，4，5，6中取值，则其中有实数解的方程的个数是______ 个．
【单选题】Ballet serves as a backbone( 主干 ) for many other styles of dance, as many other dance genres( 流派 ) are based on ballet. Ballet is based on techniques that have been developed ________(几百年来). Ballet us...
A.
over years
B.
over centuries
C.
for months
D.
for decades
【单选题】1 After graduating from high school in Michigan, Madonna received a dance scholarship to the University of Michigan School of Music, Theatre & Dance. After convincing her father to allow her to take b...
A.
Received a dance scholarship to the University of Michigan School of Music.
B.
Relocated to New York City.
C.
Worked as a Dunkin’ Donuts waitress and danced with modern dance troupes.
D.
Continue making music with club DJ Mark Kamins.
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