如图所示是滑动变阻器的结构示意图．若将A、D两接线柱接入电路，当滑片P向右移动时

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项.

 51 It is considered a healthy practice if both the parents show equal participation in designing the baby’s room. This helps to create a special bond between the baby and the parents even before the baby is born.   52  Which one will suit your baby’s and your requirements should be determined so that designing the layout(布局) becomes easier.

  53 Pink baby room ideas for girls are the most suitable ones. Installing pink colored furniture, curtains and toys will make one of the best girl baby room ideas.   54  Yellow and orange or pink and brown baby room ideas prove to be neutral and can be opted(选择) for, if the gender of the baby is not known or if you are expecting twins. Another great alternative can be to paint cartoon pictures or a theme onto the walls to implement(实现) cute baby room wall ideas. If you are planning to set a theme for your baby’s room, then baby room mural ideas will provide you with the dramatic touch you want to add to the room.

  55  Picking up a theme from a fairytale, story books, nursery rhymes, cartoon series, etc. can prove to be educational as well as creative baby room ideas. Painting the walls according to the theme with every incident sketched on each wall is a creative baby room mural idea. If you want your baby to wake up to the beauty of nature, jungle baby room ideas will suit your needs. Painting the walls with trees and animals or installing a wall paper with eye-catching scenery can have a great effect on the baby. Celebrity baby room ideas are desirable for those crazy about Hollywood. Stars’ room or design the room with photos and belongings of the actor.

A．There are a lot of baby room ideas.

B．A baby’s room should have bright colors.

C．Boy’s baby room ideas can have a sports theme.

D．If ou are expecting twins, go for twin baby room ideas.E. Setting a baby room theme is a good idea for baby rooms.

F. Baby room ideas for boys will include everything set in blue.

G. The baby’s room should have a pleasant and happy environment.

车站停电后屏蔽门系统能保证正常工作（）分钟，开关门3次。

潜孔钻机是利用潜入孔底的冲击器与钻头对矿物进行冲击破碎，其主要特点是（）。

A.一次成孔

B.排渣方便

C.结构简单、造价低廉

下列哪项不是氯丙嗪的代谢过程（）

A.苯环羟基化

B.侧链去甲基

C.侧链N氧化

D.5位硫的氧化

E.脱去Cl原子