Which of the following statements can best describe the telephone in the U. S.？
A. It's very inexpensive.
B. It saves a lot of trouble.
C. It's very convenient.
D. A, B and
查看答案
A．kept upB．followedC．came upD．advanced
A. kept up
B. followed
C. came up
D. advanced
A．lessonsB．teachingsC．coursesD．lectures
A. lessons
B. teachings
C. courses
D. lectures
A．estateB．propertyC．wealthD．assets
A. estate
B. property
C. wealth
D. assets
What are the scientists at the University of California doing to help patients blink？
A. They are transplanting a piece of muscle from the leg to the eye.
B. They are doing surgeries on the eye to help patients blink.
C. They are doing tests of a new blink system on real patients.
D. They are developing artificial muscles to help patients blink.
微信支付 
支付宝支付