【简答题】MODEL 1: Where are you off to? Laura: Dave, 1 ? David: I’m heading for the library. Max: Hey, 2 returning these books for me? They’re du...
【单选题】以下对于正弦函数 y = sin x 的图象描述不正确的是 ( )
A.
在 x ∈ [2 k π , 2 k π + 2π] , k ∈ Z 上的图象形状相同,只是位置不同
C.
介于直线 y = 1 和 y =- 1 之间
【简答题】阅读理解。 Hello, nice to meet you. My name is David and I'm a student at Beijing International School. This is a photo of my family. These are my parents and my little sister is behind me. We're from Amer...
【简答题】用所给单词的适当形式填空。 1. —Where ________ (be) the notebooks? —They are in the backpack. 2. Look! The ________ (key) are under the desk. 3. Jim, please ________ (take) these things to your brother. 4. Can you ...
【单选题】以下对正弦函数y=sin x的图象描述不正确的是( )
A.
在x∈[2kπ,2kπ+2π](k∈Z)上的图象形状相同,只是位置不同
【简答题】用动词be (am, is, are)填空。 1. She _____ a teacher. Her name _____ Mary. 2. I _____ a boy. My name _____ Li Ming. 3. Who _____ this girl? She _____ Li Mei. 4. How old ______you? I _____ eleven. 5. What _...
【判断题】正弦函数 y = sin x ( x ∈ R ) 的图象关于 x 轴对称 . ( )
【判断题】正弦函数 y = sin x 的图象在 x ∈ [ 2 k π , 2 k π + 2π ] ( k ∈ Z ) 上的图象形状相同 , 只是位置不同 . ( )
【单选题】为了得到函数 y =sin( x + ) , x ∈R 的图象,只需把正弦曲线 y =sin x 上的所有的点 ( )