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【单选题】
制备汤剂时,质地坚实的矿物、贝壳类饮片应当(A.
后下
B.
先煎
C.
包煎
D.
另煎
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皮皮学刷刷变学霸
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【单选题】关于发动机机油消耗超标的原因,下列说法不正确的是()
A.
活塞、活塞环与缸壁磨损严重,造成配合间隙过大所致
B.
气门油封损坏所致
C.
活塞环与活塞环槽磨损严重,导致窜机油
D.
燃油压力过高所致
【单选题】When new firms have an incentive to enter a competitive market, their entry will
A.
increase the price of the product.
B.
drive down profits of existing firms in the market.
C.
shift the market supply curve to the left.
D.
increase demand for the product.
【单选题】Which of the following does not happen when new firms enter a monopolistically competitive industry?
A.
The demand curve for each of the existing firms will fall.
B.
The demand curve for each of the existing firms will move inward.
C.
The demand curve for each of the existing firms will becomes relatively more elastic.
D.
The demand curve for each of the existing firms will shift to the right.
【单选题】关于发动机机油消耗超标的原因,下列说法不正确的是()。
A.
燃油压力过高导致
B.
气门油封损坏所致
C.
活塞环宇活塞环槽磨损严重,导致窜机油
D.
活塞、活塞环与缸壁磨损严重,造成配合间隙过大所致
【单选题】In the long run, new firms will enter a perfectly competitive market when firms in the market are _______.
A.
making zero economic profit
B.
increasing output in order to maximize profit
C.
incurring economic losses
D.
making positive economic profits
E.
shutting down temporarily to reduce their economic losses
【单选题】关于发动机机油消耗超标的原因,下列说法不正确的是()。
A.
活塞、活塞环与缸壁磨损严重,造成配合间隙过大所致
B.
活塞环与活塞环槽磨损严重,导致窜机油
C.
气门油封损坏所致
D.
燃油压力过高所致
【单选题】关于发动机机油消耗超标的原因,下列说法不正确的是()。
A.
活塞、活塞环与缸壁磨损严重,造成配合间隙过大所致
B.
气门油封损坏所致
C.
活塞环与活塞环枻磨损严重,导致窜机油
D.
燃油压力过高所致
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