城市轨道交通对新从业人员安全生产教育培训时间不得少于（）学时。 A.32 B.24

阅读短文回答问题。

      Tom is an English student. He is eleven. Jim is his brother. He is twelve. They are in China now. They are

in the same grade (年级). But they are in different classes. Tom is in Class Three, Grade One. Jim is in Class

Two, Grade One. They usually go to school in their father's car. Tom likes a circle. Jim likes a triangle. Their

father and mother are English teachers. Their mother is an American woman. She speaks good English. She

likes wearing a dress. Their father is an English man. He speaks English well. He likes blue. He often wears

blue clothes.

1. Where is Tom now?

__________________________________________________________

2. Are Tom and Jim in the same class?

__________________________________________________________

3. How does Jim go to school?

__________________________________________________________

4. Is Tom's mother an English woman?

__________________________________________________________

5. What does Tom's mother like to wear?

__________________________________________________________

为探究电流与电压、电阻的关系，小星将实物连接成如图甲所示。

（1）请你指出图甲中连接的错误之处：

①____________________________________________________________；

②____________________________________________________________。

（2）电路连接正确后，在研究电流与电阻的关系时，更换阻值不同的定值电阻后，应调节滑动变阻器，使定值电阻两端的电压_________（选填“增大”、“减小”或“不变”）。

（3）图乙是实验中电流表的某次示数，则电流是_______A。要使电路中的电流增大，根据正确的连接，滑动变阻器的滑片应向_______端移动。

以下哪项技术可以使拥有有限资源的制造商实现利润最大化

A．德尔菲法。
B．指数平滑法。
C．回归分析法。
D．线性规划。

肾主纳气的主要的生理作用是

A．有助于元气的生成
B．有助于肺气的宜发
C．有助于气道的通畅
D．有助于固摄精气
E．有助于呼吸保持一定的深度

凉膈散中用大黄、芒硝，是取其泻下而清上。