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【单选题】
压电式传感器是个高内阻传感器,因此要求前置放大器能够将其变换为( )。A.
低阻抗输出
B.
高阻抗输出
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皮皮学刷刷变学霸
举一反三
【单选题】What do people do for Christmas?
A.
Schools and colleges close for two weeks.
B.
Business firms are lenient about giving leave to employees for the Christmas visit to their homes.
C.
Parents welcome their children and grandchildren home and often open their doors to friends and strangers.
D.
All of the above.
【简答题】What do people visit museums for?
【单选题】---It’s 10．00 p．m．Say′ ′to your parents．---OK, I will.
A.
Good morning
B.
Good evening
C.
Good afternoon
D.
Good night
【简答题】What do people visit museums for?
【单选题】What do people do on the second day of the celebration?
A.
Invite brothers to visit sisters.
B.
Burst crackers.
C.
Celebrate the defeat of the demon.
D.
Pray to the goddess of prosperity to fulfil their wishes.
【多选题】What do people usually do when they visit their ancestor tombs duringthe Qingming Festival?
A.
Eating mooncakes
B.
Sweeping the tombs
C.
Making ritual offerings
D.
Commemorating their ancestors
【单选题】We say' _____ ' to our teachers at 3:00p.m. [ ]
A.
Good morning
B.
Good afternoon
C.
Good evening
D.
Good night
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