单项选择题

It can be concluded that ______.

A．the sky always turns gray only on weekends.
B．in the Midwest, weekdays saw larger daily temperature variations sometimes.
C．this difference measurement is called DTR, meaning the daytime temperature range.
D．part of the study involved 660 weather stations only in the United Nation.
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单项选择题
Which of the following statements is not true according to your reading
A．Placing a piece of tissue paper between each layer of clothing will help prevent wrinkling.
B．You must stuff your shoes with underwear or socks and other valuables so they won't be crushed during your travels.
C．Pack each item one at a time in a clockwise direction.
D．Check with the Transportation Security Administration to verify that the items you are carrying on the plane are allowed onto the aircraft.
单项选择题
Which of the following is the best title for the above
A．Health.
B．Money, Documents, Passports.
C．Packing.
D．Security.
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