教育是一种社会历史现象，产生于生产劳动，其根本目的在于促使学生个体的全面发展，提倡教

根据短文内容，判断正（T）误（F）。

     Look at the things. Mike's ruler is blue. Dale's pen is white. Alice's pencil isgreen. What's on the

desk? Oh! It's a key. It's my key.  It's black. Look at the jacket on the chair. It's not my jacket.  It's

Lucy's. What color is it? It's pink. Is it beautiful (漂亮的)?

(    )1. Mike's ruler is blue.      

(    )2. Alice's pen is green.      

(    )3. I have a black key.        

(    )4. My jacket is on the chair.  

(    )5. Lucy's jacket is pink.      

下列说法错误的是

①酸、碱、盐的组成中一定都有氢元素；②改变某饱和溶液的温度，一定会使溶液变为不饱和溶液；③任何火灾都可用水扑灭；④任何原子都必须有质子、中子和电子构成[ ]

A、①②③

B、①②③

C、①②③

D、①②③④

下列哪项在统一权限中普通用户角色不能使用（）

A、账号申请

B、密码重置

C、业务应用注册申请

D、与业务组织角色关联

义务教育的学制通常有（）。

A．“六三”学制

B．“五四”学制

C．“九年一贯制”

D．“四二”学制

The short-run supply curve to a firm operating under perfect competition is most accurately described as the segment of the:（）

A. marginal cost curve below the average total cost curve.

B. average total cost curve above the marginal cost curve.

C. marginal cost curve above the average variable cost curve.