测量版膜厚度用（）仪器最优 A.膜厚计 B.浓度计 C.游标卡尺 D.分厘卡

一物体做初速度为零的匀加速直线运动，加速度为a=2m/s²，求

（1）5s末物体的速度多大？

（2）前4s的位移多大？

（3）第4s内的位移多大？

读黄河水系图，回答下面的问题

Must-Read about Notting Hill Carnival(狂欢节)

Route

The carnival procession itself begins at 9am on both Sunday and Monday. It starts on Great Western Road, winding its way along Chepstow Road, then on to Westbourne Grove, and then down Ladbroke Grove. See our Notting Hill Carnival map for the full route.

Bus 

While extra services will be in operation, no buses will enter the Carnival area from first thing Sunday morning until the first service on Tuesday morning. On both days bus services begin from Notting Hill Gate in the south and from Harrow Rd (close to Elgin Avenue) in the north.

Bike

Last year the nearest bike-parking stations – Chepstow Villas and Pembridge Road – were removed for Carnival, so don’t rely on being able to park your bike nearby this year.

Safety

Avoid carrying expensive items, such as jewellery and digital cameras. Take a bag with a secure zip to keep your more valuable possessions in and avoid putting your valuables in your back pocket. 

Do tell police if you see an incident. Officers will be stationed throughout the Carnival area. Don’t try to walk against the flow of the crowd, as you won’t get far. Drink plenty of water on the day too, especially if the sun makes an appearance.

Children

Children’s Day on Sunday is recommended for families as the smaller crowds and kid-friendly floats(游行花车) create a fun atmosphere. Arrange meeting points in case you become separated. The smaller the buggy(婴儿车), the better. Ear defenders may be necessary for very young children.

小题1:Visitors are warned not to bike to the Carnival because _________.

A．there are an increasing number of bike thefts there

B．there are no bike-parking stations nearby

C．roads to the Carnival area are closed to bikes

D．they will be charged with extra parking fees小题2:Visitors had better_________.

A．wear trousers without back pockets

B．bring plenty of beer with them

C．leave their valuables in the hotel

D．walk along the flow of the crowd小题3:People who go to the carnival with children are advised_________.

A．to be there on Sunday

B．to let their children go wherever they like

C．to arrange a meeting time

D．to bring ear defenders for each child.

引起左心室广泛梗死见于（）

A.左冠状动脉前降支闭塞

B.右冠状动脉闭塞

C.左冠状动脉回旋支闭塞

D.左冠状动脉主干闭塞

E.心肌病变

人员出入基站须尽量保持基站门关闭，以免冷气流失并防止产生（）误告警。

A、烟雾

B、温度

C、湿度

D、断电

E、门禁