It may be so in theory, but now will it work______?A.in existenceB.in advanceC.in turnD.in
It may be so in theory, but now will it work______?
A.in existence
B.in advance
C.in turn
D.in practice
It may be so in theory, but now will it work______?
A.in existence
B.in advance
C.in turn
D.in practice
A.may not,must
B.must,may not
C.can't must
D.must can't
A. So
B. Since
C. However
D. Despite
此题为判断题(对,错)。
For even greater saving, always dial direct, that is, without an operator’s help. Rates(资;费) on direct calls are lower after five o’clock in the evening and lowest after eleven o’clock at night. Collect, person-to-person, and pay phone calls require the services of an operator, and they cost more than direct calls.
Need to call out of the country? Now calls to many overseas places may be dialed direct. Check your telephone direction for overseas area codes.
Next time you have good news, or you just want to stay in touch, remember, a phone call means so much more than a letter. This has been a message from Southern Bell Telephone Company.
(1) To make a ten-minute call costs $2.60, if you are in New York and want to be connected with a person in_______.
A.Alaska B.Los Angeles
C.Hawaii D.Mexico City
(2) According to this passage, when is a dial telephone call cheapest?
A.During weekend hours.
B.After 5 in the evening.
C.During working hours.
D.After 11 at night.
(3) Which type of call requires less money?
A.A direct dial call.
B.A collect call.
C.A person-to-person call.
D.A call from a pay phone.
(4) What should one do in order to make an overseas call?
A.Dial the operator.
B.Call telephone Southern Bell Telephone Company.
C.Check the phone book for the overseas operator’s number so that he can help you.
D.Check the phone book for overseas area codes so that you can dial direct.
(5) This passage is_______.
A.an article B.letter
C.a talk D.a dialogue
将英语短文译为中文
3 Self-Powered Nanotech (10分)
Nanosize machines need still tinier power plants
By Zhong Lin Wang
The watchmaker in the 1920s who devised the self-winding wristwatch was on to a great idea: mechanically harvesting energy from the wearer’s moving arm and putting it to work rewinding the watch spring.
Today we are beginning to create extremely small energy harvesters that can supply electrical power to the tiny world of nanoscale devices, where things are measured in billionths of a meter. We call these power plants nanogenerators. The ability to make power on a minuscule scale allows us to think of implantable biosensors that can continuously monitor a patient’s blood glucose level, or autonomous strain sensors for structures such as bridges, or environmental sensors for detecting toxins — all running without the need for replacement batteries. Energy sources are desperately needed for nanorobotics, microelectromechanical systems (MEMS), homeland security and even portable personal electronics. It is hard to imagine all the uses such infinitesimal generators may eventually find.
In Brief
★Nanotechnology has huge potential — but those minuscule devices will need a power source that is better than a battery.
★ Waste energy, in the form. of vibrations or even the human pulse, could provide sufficient power to run such tiny gadgets.
★ Arrays of piezoelectric nanowires could capture and transmit that waste energy to nanodevices.
★ Medical devices will likely be a major application. A pacemaker’s battery could be charged so it would not need replacing, or implanted wireless nanosensors could monitor blood glucose for diabetics.
A.正确
B.错误
A.scarce
B.minimum
C.short
D.seldom
B.feature
C.distinctive feature
D.function