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【单选题】
What purpose do CVB satellite offices serve?A.
They provide workspace for CVB salespeople when they are out on sales calls.
B.
They allow CVB sales staff to make presentations to large groups of potential customers at the same time.
C.
They allow CVBs to continually bring their message to the customer on the customer’s home turf.
D.
They provide workspace for meeting and convention planners while their event is being held.
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举一反三
【单选题】下列各溶液中，Na + 浓度最大的是（ ）
A.
0.8L0.4mol/L的NaOH溶液
B.
0.1L0.5mol/L的NaCl溶液
C.
1L0.3mol/L的NaCl溶液
D.
0.2L0.15mol/L的Na 3 PO 4
【单选题】As shown in the figure, the lengths of the cantilever beam and the simply supported beam are the same. For the Fs diagrams and M diagrams of the two beams, which of the following statements is true?
A.
Both Fs and M diagrams of the two beams are the same.
B.
Both Fs and M diagrams of the two beams are different.
C.
Fs diagrams of the two are the same, M diagrams are different.
D.
Fs diagrams of the two are different, M diagrams are the same.
【单选题】In a Young’s experiment, it is essential that the two beams
A.
have exactly equal intensity
B.
be exactly parallel
C.
travel equal distances
D.
come originally from the same source
【单选题】下列水溶液凝固点最高的为( )。
A.
0.1mol.L-1HAc
B.
0.1mol.L-1CaCl2
C.
0.1mol.L-1NaCl
D.
0.1mol.L-1葡萄糖
【单选题】You ______ your own sandwiches. I have enough for two.
A.
couldn't have brought
B.
mustn't have brought
C.
shouldn' t have brought
D.
needn' t have brought
【单选题】You ______ your own sandwiches. I have enough for two.
A.
couldn't have brought
B.
shouldn't have brought
C.
mustn't have brought
D.
needn't have brought
【单选题】The material and cross-section of the two beams are the same (as shown in the figure), then the ratio of the maximum deflection of the two beams ( y a : y b ) is .
A.
1
B.
1/4
C.
1/8
D.
1/16
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