按征收目的不同，关税可分为（）。 A.保护性关税和财政性关税 B.进口关税、出口关税

雪天行车，车轮的附着力大大减小，跟车距离不是主要的，只需要保持低速行驶便可以防止事故发生。

【 】是Java提供的建立图形用户界面GUI的开发包，它可用于Java的Applet和Application中，它支持图形用户界面的编程。

阅读下面材料，用不多于3个单词的正确形式填空

Are you facing a situation that looking impossible to fix?

In 1969, the pollution is terrible along the Cuyahoga River near Cleveland, Ohio. It ______小题1:(be)imaginable that it could be ever be cleaned up. The rive was so polluted that it ______小题2:(actual) caught fire and burned. Now year late,this rive is one of_______小题3:most outstanding examples of environmental cleanup.

But river wasn’t changed in a few days_____小题4:even a few months. It took years of work _______小题5:(reduce) industrial pollution and clean the water. Finally, that hard work paid off and now the water in the river is______小题6:(clean) than ever.

Maybe you are facing an impossible situation. Maybe you have a habit _____小题7:is driving your family crazy. Possibly you drink too much or don’t know how to control your credit card use. When you face such impossible situation, don’t you want a quick fix and something to change immediately.

While there are_______小题8:(amaze) stories of instant transformation, for most of us the  _______小题9:(change) are gradual and require a lot of effort and work, like cleaning up a polluted river. Just be_______小题10:(patience)

患者程某，小便频数，尿如米泔色，心神恍惚，健忘神疲，舌淡苔白，脉细弱。治宜选用（）。

A.金锁固精丸

B.桑螵蛸散

C.济生肾气丸

D.金匮肾气丸

E.六味地黄丸

如图所示，将两个小球a，b用细线连接后悬挂在水平天花板上，其中b球搁置在光滑斜面上．在下列各种情况中能够使系统保持静止的是（　　）

A．

B．

C．

D．