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【单选题】
用液体温度计测得某物体的温度值为20.15℃，而用铂电阻温度计同时测得的值为20.01℃，已知铂电阻温度计的误差远远小于液体温度计的误差，则该液体温度计在该点的示值误差等于( )。A.
0.14℃
B.
0.15℃
C.
-0.15℃
D.
-0.14℃
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【单选题】What is the mans request?
A.
To have breakfast in the room.
B.
To pay the bill when checking out.
C.
To sign the name in the morning.
D.
To use a new credit card for the room.
【单选题】When checking the liquid level in a tank, you should position yourself _____.
A.
on the windward side of the opening
B.
on the leeward side of the opening
C.
at a right angle to the wind direction
D.
so that the obstruction of your body will protect you from the fumes
【单选题】What does the professor mean when she says this:
A.
She is checking to be sure that the students understand.
B.
She is expressing uncertainty about the information.
C.
She is inviting the students to disagree with her.
D.
She is indicating that she is in a hurry to continue.
【简答题】定义:如果a∶b=b∶c,那么b称为a和c的比例中项.如图11∶2=2∶4,则2是1和4的比例中项.已知0.6是0.9和x的比例中项,1/5是12和y的比例中项,则x+y=____.
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