已知△ABC的三边长为5，12，x，可知当x=12时△ABC是等腰三角形； （1

This hat is too _____________. My _____________ is stuck. [ ]

A, small; hand

B. big; head

C. small; head

阅读理解，回答问题。

     Jim, Kate and Wang Hong are students in Class 3, Grade l of No. 11 Middle School in Beijing. Jim

is from the UK. Kate is from the USA. Wang Hong is a Chinese girl. The three students are good friends. They often do homework together and play together.

     Now, Jim, Kate and Wang Hong are doing their homework. Jim's spelling of "Monday" is wrong.

Kate tells him about it. Wang Hong doesn't have an eraser in her pencil case.  She wants to borrow(借)

one from Jim or Kate. Jim says he has one and gives (给) it to Wang Hong. Wang Hong thanks Jim for

help. Jim says, "You're welcome. " Now Jim says, "Thanks a lot," to Kate for her help. " Not at all," says

1. Where do they study(学习)? 

    ____________________________________

2. Is Wang Hong a Chinese girl?

    ____________________________________

3. Does Wang Hong have an eraser? 

     ____________________________________

4. Who has an eraser?

    ____________________________________

5. What do they often do together?

    ____________________________________

图中A、B两个螺线管通电后小磁针在如图位置静止，电流表的连接正确。请在图中画出螺线管B的绕法，并将小磁针的“N”端涂黑。

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (71) between sending the notification and notification arriving at the source, thousands of additional (72) may arrive. In ATM network, a major tool for preventing (73) is (74) control. When a host wants a new virtual (75) , it must describe the traffic to be offered and the service expected.

75（）

A．path

B．rout

C．circuit

D．way

电器设备或发动机失火后可用水或二氧化碳灭火机灭火。