某电路两端电压一定，电路两端接入10Ω的电阻时，通过该电阻的电流是0.2A，若改

一次函数y=2x+3的图象不经过[ ]

A．第一象限

B．第二象限

C．第三象限

D．第四象限

按要求完成下列各句

1. What is the most useful invention?  Do you think?（合并为一句）   

                                         is the most useful invention?

2.Li Lei asked me to go to his birthday party.（改为被动语态）  

I                      to go to Li Lei's birthday party.

3. The car was invented in 1885.（对画线部分提问）   

                     the car           ？

4. The workers were made to finish the work at once by the manager. （改为主动语态）    

The manager            the workers            the work at once.

5. We must do something to protect our environment.（改为被动语态）   

                                          to protect our environment.

巴比妥类药物在吡啶溶液中与铜吡啶试液作用，生成配位化合物，显绿色的药物是( )。

A．巴比妥
B．硫喷妥钠
C．苯巴比妥
D．司可巴比妥
E．异戊巴比妥

产业结构优化应符合的要求有( )。

A．产业结构合理化

B．产业结构高度化

C．产业的均衡发展

D．产业结构多元化

E．产业发展的速度、质量和效益

“白如玉、薄如纸、明如镜、声如罄”是（）的特点。

A.景德镇瓷器

B.淄博美术陶瓷

C.醴陵釉下彩瓷

D.龙泉青瓷