某运输企业与某施工单位签订了一项建设项目的运输合同，合同约定该运输企业的单位运费为0

读短文，判断正(T)误(F)。

      I'm Sarah. I have three new teachers, a science teacher, an art teacher and an English teacher. My science

teacher is Mr. Liu. He's tall and thin. My art teacher is Miss Zhao. She's pretty and young. My English teacher

is Miss Sun. She's an old woman. She's kind.

( ) 1. I have two new teachers.

( ) 2. My art teacher is an old woman.

( ) 3. My English teacher is Miss Sun.

( ) 4. My science teacher is tall and thin.

( ) 5. Miss Sun is strict.

存在实数x，使得x²﹣4bx+3b＜0成立，则b的取值范围是（   ）

肺结核分枝杆菌检测时，常用的痰涂片方法为（）。

A.革兰染色

B.抗酸染色

C.石炭酸-复红染色

D.荧光染色

E.银染色

创建全国文明城市，税务部门规范化服务要达到哪些要求？

下图是以L经线为旋转轴的复合经纬网图，若经线L的度数为东经90°，读图回答下列问题。

图中甲、乙、丙、丁四地中，经度相同的是（）。有极昼极夜现象的是（）。