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【单选题】
What is the other official language besides English in Canada?
A.
Spanish.
B.
French.
C.
Maori.
D.
Chinese.
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举一反三
【单选题】Which OSI layer is associated with the following: The acknowledgement of transmissions, sequencing, and flow control across a network?
A.
Layer 2
B.
Layer 3
C.
Layer 4
D.
Layer 5
E.
Layer 6
F.
Layer 7
【单选题】Which of the following is TRUE?
A.
Once an industry has achieved tacit collusion, producers have an incentive to raise prices.
B.
Tacit collusion is legal in the United States.
C.
The fact that one firm changes its price shortly after another firm does is proof of tacit collusion.
D.
It is difficult to determine how much tacit collusion exists in a particular industry; hence tacit collusion remains hard to prosecute in the United States.
【单选题】关于牙的叙述,何者正确(单选题)
A.
牙由牙根、牙冠和牙髓构成
B.
记录牙的位置通常以检查者的方位为准
C.
以阿拉伯数字表示乳牙
D.
牙釉质为全身最坚硬的组织
E.
牙龈是位于牙颈周围的牙组织
【单选题】宫颈癌转移途径最常见的是
A.
直接蔓延,向下累及阴道壁
B.
向前、后直接侵犯膀胱、直肠
C.
经淋巴向盆腔淋巴结转移
D.
经血行向肺、肾转移
E.
经血行向卵巢转移
【单选题】Which of the following provides an explanation for why alarge number of small competitors will reduce industry profits?
A.
Incumbent firms are more likely to benefit from economies of scale
B.
Customers are more likely to adopt substitute products
C.
Tacit collusion is harder to sustain
D.
The threat of retaliation against entrants is higher
【单选题】Tacit collusion in an industry is limited by:
A.
a large number of firms.
B.
simple products and pricing.
C.
the bargaining power of buyers.
D.
a large number of firms and the bargaining power of buyers.
【单选题】Switch operates at second layer of OSI model that is _______layer.
A.
Physical layer
B.
Network layer
C.
Data link layer
D.
Transport layer
【单选题】关于根分叉病变的叙述,下列何者正确
A.
Ⅰ度:牙周袋已达多根牙根分叉区,但分叉内无牙槽骨破坏,X线片上看不到骨质吸收
B.
Ⅱ度:分叉区骨吸收仅限于颊侧或舌侧,尚未相通,X线片见牙周膜增宽
C.
Ⅲ度:根间牙槽骨全部吸收,探针可通过根分叉区,X线片见见该区骨质小时呈透射区
D.
Ⅳ度:根间骨骼完全破坏,牙龈退缩使根分叉区完全开放
E.
以上都对
【单选题】The study of behavior in situations of interdependence is known as:
A.
dominant strategies.
B.
game theory.
C.
Nash equilibrium.
D.
tacit collusion.
【单选题】肺癌的转移途径最常见的是
A.
血行转移
B.
直接扩散
C.
淋巴转移
D.
支气管扩散
E.
胸腔种植
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