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【单选题】
在垄断竞争厂商的短期均,厂商可以 ( )A.
亏损
B.
利润为零
C.
获得利润
D.
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【简答题】完形填空 Hi, boys and girls. Have a look at Lazy Lady's 1 shop. We have blue and black hats 2 only three 3 . We 4 sweaters in all colors for only 15 dollars. The yellow shorts are on sale for 12 dollars. ...
【简答题】听句子，选出你所听到的单词或短语。 ( )1. A. see ( )2. A. schools ( )3. A. once a day ( )4. A. think for ( )5. A. went swimming B. look B. students B. two days a week B. think of B. went shopping C....
【单选题】以下关于分枝杆菌抗酸染色的叙述，错误的是
A.
标本直接涂片或集菌后涂片，干燥固定
B.
石炭酸复红温染5分钟，水洗
C.
3％盐酸酒精脱色，水洗
D.
美蓝复染2分钟，水洗
E.
油镜观察红色者为抗酸染色阴性，蓝色者为抗酸染色阳性
【简答题】There are nine boys and twenty-eight girls in our class. 1 the boys is English. His 2 is Sam. He is thir. Two of the 3 are American. They are twins. 4 names are Lucy and Jane. They are twelve....
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