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【单选题】
藻酸盐材料从口内取出后应及时灌注模型是因为（）A.
吸水收缩，失水膨胀，体积不稳定
B.
吸水膨胀，失水收缩，体积不稳定
C.
时间过长，变硬，不易脱模
D.
石膏凝固时间长
E.
以上均不正确
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皮皮学刷刷变学霸
举一反三
【单选题】下列句中加点虚词的意义和用法不相同的一项是( )
A.
藏花枕底，垂头而睡 徐而察之
B.
怪吴不至，折柬招之 商君佐之
C.
母疑其为鬼 为仲卿母所遣
D.
女于荒烟错楚中 颁白者不负戴于道路矣
【单选题】When the price level falls, ( )
A.
The interest rate falls because people will want to hold more money and so sell bonds.
B.
Firms will want to spend more on new business buildings and business equipment and households will want to spend more building new homes.
C.
Both A and B are correct.
D.
None of the above are correct.
【单选题】According to the author, one had better______.
A.
buy more shares when the stock price falls down
B.
sell out the shares when the stock price falls down
C.
do some research on the value of a business when its stock price falls down
D.
invest in the business when its stock price falls down
【单选题】The price of vegetables fluctuates according to the weather.
A.
jumps
B.
rises
C.
falls
D.
changes
【单选题】Along a linear demand curve, as price falls
A.
the elasticity of demand is constant
B.
the elasticity of demand falls
C.
the elasticity of demand increases
D.
the elasticity is the same as the slope of the demand curve
【简答题】我国高赖氨酸玉米的育种目标是：籽粒中赖氨酸含量（），产量可略低于普通玉米推广杂交种，不发生穗腐或粒腐病，抗大、小斑病，胚乳最好为（）。
【单选题】As the market price of a good falls, consumer surplus:
A.
falls.
B.
rises.
C.
does not change.
D.
can either fall, rise, or stay the same.
【判断题】我国高赖氨酸玉米的育种目标是：籽粒中赖氨酸含量不低于0.2%，产量可略低于普通玉米推广杂交种，不发生穗腐或粒腐病，抗大、小斑病，胚乳最好为硬质型。
A.
正确
B.
错误
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