问题
选择题
下列方程为一元一次方程的是（ ）
|
答案
A、分母中含有未知数，不是一元一次方程，故本选项错误；
B、含有两个未知数，不是一元一次方程，故本选项错误；
C、未知项的最高次数为2，不是一元一次方程，故本选项错误；
D、符合一元一次方程的定义，故本选项正确．
故选D．
搜题请搜索小程序“爱下问搜题”
下列方程为一元一次方程的是（ ）
|
A、分母中含有未知数，不是一元一次方程，故本选项错误；
B、含有两个未知数，不是一元一次方程，故本选项错误；
C、未知项的最高次数为2，不是一元一次方程，故本选项错误；
D、符合一元一次方程的定义，故本选项正确．
故选D．
e is with our product. Also, John Webb, one of your son's friends, has bought a boat from us and, w
e understand, is very happy with his boat. We are always happy to know that our customers are satisfied. We are writing to you now because, as you know, your son has decided to buy a larger boat, and we need your signature on the loan(贷款) papers. The loan application has already been signed b
y Danny. As you will see, there is one form to fill out, and there are three contracts to sign. Danny's 26-foot boat was returned to our San Pedro Dock yesterday, and we are pleased to say that the new 36-foot "Challenger" will be delivered(送达) two weeks from today. It is being inspected by ou
r manager right now. The auto-pilot(自动领航仪) has already been installed by our mechanic. It looks as though everything will be ready in time for delivery. All we need are the signed contracts from you.