A×(B+C)=A×B+B×C______.(判断对错)
根据乘法分配律的意义,A×(B+C)=A×B+A×C;
因此A×(B+C)=A×B+B×C.是错误的.
故答案为:×.
______________ jump on the train. [ ]
A. Doesn't
B. Don't
C. Not
设x,y和z都是int型变量,且x=3,y=4,z=5,则下面表达式中,值为0的表达式是
A.x&&y
B.x<=y
C.x||++y&&y-z
D.!(x<y&&!z||1)