问题 填空题

一个导体两端的电压为2V时,通过它的电流为0.25A,该导体的电阻为______Ω;当这个导体两端不加电压时,该导体的电阻为______Ω.

答案

(1)电阻的阻值:

R=

U
I
=
2V
0.25A
=8;

(2)∵电阻与两端的电压和通过的电流无关,

∴当它两端不加电压(电压变为0)时,电阻的阻值仍为8Ω.

故答案为:8;8.

阅读理解

GARDEN RESTAURANT
Tel:  2706630
Add: 9020 Bridgeport Road
Open: Mon. to Fri. 7:00a.m—2:30p.m.
5:00p.m.—9:00p.m.
Sat. 7:00a.m—11:00a.m.
5:00p.m.—9:30p.m.
Sun. 11:00a.m.—2:00p.m.
5:00p.m.—9:30p.m.
SKYLINE HOTEL
Tel: 2785161
Add: 3031 No.3 Road
( at Sea Island Way)
The Hangar Den:
Wed. to Sun. Lunch from 10:30a.m.
Coffee Shop: Mon.—Fri. 6:00a.m.
Sat. 6:00a.m.
Sun. 7:00a.m.
Mon.—Wed. to 10:00p.m.
Thurs—Sun. to 11:00p.m.
LANSDOWNE PARK SHOPPING CENTER
Tel:  3562367
Add:  5300 No.3 Road
Open:
Mon. Tues. Sat. 9:30a.m.—5:30p.m.
Wed. Thurs. Fri. 9:30a.m.—9:30p.m.
Sun. 11:00a.m.—5:00p.m.
NEW YORK MUSEUM
Tel:  364431
Add: Vanier Park, 1100 Chestnut St.
Open:
Mon.to Fri. 9:00a.m.—5:00p.m.
Sat. 9:00a.m.—1:00p.m.
(Monday free)
小题1:If you want to go out for lunch on Tuesday you can call up the number     .
A.2706630B.7364431C.3562367D.2785161
小题2:You do not have to pay on Monday if you go to     .
A.Skyline Hotel
B.Lansdowne Park Shopping Center
C.New York Museum
D.Garden Restaurant
小题3:Suppose you want to enjoy yourself on Sunday mornings, you can go to     .
A.5300 No.3 Road
B.Vanier Park, 1100 Chestnut St.
C.9020 Bridgeport Road
D.3031 No.3 Road
小题4:What can you do after 9:30p.m. on Sunday?
A.Visit New York Museum.
B.Do some shopping in Lansdowne Park shopping Center
C.Go to Garden Restaurant
D.Go to the Coffee Shop of Skyline Hotel
小题5:According to the ad, which of the following is TRUE?
A.At 6:00 am every day coffee is served at SKYLINE HOTEL.
B.You can have supper every day at GARDEN RESTAURANT
C.Tel 2785161 can give you some information about shopping.
D.NEW YORK MUSEUM is open from Monday to Sunday.
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