出生后2个月内的小儿应接种的疫苗是 A．卡介苗 B．乙型脑炎疫_爱下问搜题

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问题单项选择题

出生后2个月内的小儿应接种的疫苗是

A．卡介苗

B．乙型脑炎疫苗

C．麻疹减毒活疫苗

D．脊髓灰质炎疫苗

E．白、百、破疫苗

答案

参考答案：D

阅读理解

阅读理解。

A Cute (惹人喜爱的) Dog

Hello, my name is Jerry. I have a very cute dog. Its (它的) name is Lucky. It's white and black. It's two years
old now. It couldn't (不能) help me catch a ball then. But it can catch the ball now. It can also (也) help me open
the door. I love it very much.
根据短文内容，完成下面的表格。
My dog

Name	1.
Age	2.
Colour	3.
Couldn't	4.
Can	5.

解答题

已知两函数f(x)=8x²+16x-k,g(x)=2x³+5x²+4x,其中k为实数.

(1)对任意x∈[-3,3]都有f(x)≤g(x)成立,求k的取值范围.

(2)存在x∈[-3,3]使f(x)≤g(x)成立,求k的取值范围.

(3)对任意x₁,x₂∈[-3,3]都有f(x₁)≤g(x₂),求k的取值范围.