令 f(x)=2x+7=0,可得x=-72,故函数f(x)=2x+7的零点为-72,
故答案为-72,
故选D.
补全对话。(每空一句)
(At Mr. White’s office in a middle school)
A: Hello! 1_____?
B: Speaking, please.
A: I’m Peter’s mother. I’d like to ask for my son.
B: 2_____?
A: He doesn’t feel well this morning. He has a cold.
B: 3_____. Is it serious?
A: Not very serious. But the doctor asked him to stay in bed and have a good rest.
B: Don’t worry.4 _____.
A: Thank you , sir. Goodbye!
B:5 _____!
根据脏腑在舌上的分部理论,舌边属()。
A.心肺
B.脾胃
C.肾
D.肝胆
E.三焦