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【单选题】
在数字基带传输系统中,以下不能消除码间串扰的系统传输特性为( )。A.
理想低通特性
B.
升余弦特性
C.
匹配滤波特性
D.
线性滚降特性
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【简答题】It has been proved that the upper atmosphere above certain distance continually grew thinner and colder ______．
【单选题】It has been proved that eating nuts can
A.
lower peoples body weight, BMI and waist circumference
B.
reduce inflammation in the body
C.
lower peoples risk of heart disease, cancer and arthritis
D.
increase young mens sperm count and boost their fertility
【单选题】When inspecting a tank barge to see that it has all the required fire extinguishers and other safety items aboard，which of the following is the best source for determining what is required? （）
A.
The supervisor in charge of the dock to which the barge is tied up
B.
Part 38 of the Rules and Regulations for Tank Vessels
C.
The Certificate of Inspection of the barge
D.
The local fire marshal
【判断题】All required items on the cards should be filled in with neat and clear letters. The cards filled with pencil are invalid.
A.
正确
B.
错误
【简答题】对混凝土拌和物流动性大小起决定性作用的是拌和用水量的多少。
【单选题】It has been proved that listening to simple, happy has a good effect on
A.
cows.
B.
workers.
C.
customers.
D.
bosses.
【单选题】The sum of all of the debit items in the balance of payments:
A.
equals the overall balance.
B.
equals the sum of all credit items.
C.
equals ‘compensating’ transactions.
D.
equals the errors and omissions.
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