（）人把菊花作为丧花，只有在葬礼时才使用。A、美国B、泰国C、德国D、法国

什么是等额累进还款法？

保证是债务人和债权人约定履行债务或者承担责任的行为。( )

如图所示，两根足够长的光滑金属导轨MN、PQ平行放置，导轨平面的倾角为θ，导轨的下端接有电阻．当空间没有磁场时，使ab以平行导轨平面的初速度v₀冲上导轨平面，ab上升的最大高度为H；当空间存在垂直导轨平面的匀强磁场时，再次使ab以相同的初速度从同一位置冲上导轨平面，ab上升的最大高度为h．两次运动中导体棒ab始终与两导轨垂直且接触良好．关于上述情景，下列说法中正确的是（　　）

A．两次上升的最大高度比较，有H=h

B．两次上升的最大高度比较，有H＜h

C．有磁场时，ab上升过程的最大加速度为gsinθ

D．有磁场时，ab上升过程的最小加速度为gsinθ

阅读理解。

     A lazy Susan is an addition to a table that is designed to assist in moving food from one person to another

while dining. This is achieved through the use of a turntable (转盘), which usually moves the food in a circle

when it is pushed by those at the table. In this way, the food never has to be picked up and passed around the

table. Instead, it remains in place on the lazy Susan.

     A lazy Susan may also be a part of a kitchen cabinet (橱柜). In this sense, the lazy Susan is a type of

shelving unit within the cabinet that is able to turn around its axis (轴心). One may turn the lazy Susan in order

to find certain goods in storage. From the outside, a lazy Susan appears to be two cabinets that are located at

a right angle (直角) to each another. When one of these cabinets is pushed, however, both doors move and the

lazy Susan is revealed inside.

     It is believed that Thomas Jefferson invented the lazy Susan in the 18th century, though it was called

"dumbwaiter" at that time. It is said that Jefferson invented the lazy Susan because his daughter complained

she was always served last at table and, as a result, never found herself full when leaving the table. Others

believe that Thomas Edison was the inventor, as he is believed to have invented the turntable for his

phonograph (留声机). The turntable may have developed into the lazy Susan later.

     Regardless of who invented it, it wasn't until 1917 that the term"lazy Susan" was used in an advertisement

for the invention. In Britain, however, the term"dumbwaiter" is still used rather than"lazy Susan". The reason

for the naming of it is still a mystery. One theory is that it was named after either Jefferson's or Edison's

daughter, both of whom were named Susan.

1. What is a "lazy Susan"?

A. A waitress

B. A convenient tool

C. A table

D. A cabinet

2. According to those who believed Thomas Jefferson invented the lazy Susan, ______.

A. his daughter was very lazy

B. the lazy Susan didn't exist until the 18th century

C. Thomas Edison was his friend

D. Thomas Edison didn't invent the phonograph

3. We can learn from the last paragraph that _______.

A. the lazy Susan can work by itself

B. the lazy Susan was named after Thomas Edison's daughter

C. how the lazy Susan got its name remains unknown

D. the lazy Susan was invented in Britain

4. The writer wrote the passage mainly to _______.

A. discuss how the lazy Susan was named

B. teach us how to make a lazy Susan

C. introduce Thomas Edison's inventions

D. tell us what a lazy Susan is and its origin

伤口分泌物较多，肉芽组织水肿苍白宜用（）

 A．凡士林纱布 

B．3%～5%盐水湿敷 

C．10%硝酸盐涂擦创面 

D．1：1000苯氧乙醇湿敷 

E．漂白粉硼酸溶液湿敷