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【单选题】
The annual turnover last year was US $ 28 million and the company made a large __________.A.
interest
B.
profit
C.
settling
D.
finance
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【单选题】Experts eventually decided to investigate ______ .
A.
because they did not believe that pumas existed in England
B.
because they wanted a puma for the London Zoo
C.
when a woman saw a puma in a small village
D.
because people's descriptions of the puma had a lot in common
【单选题】Experts eventually decided to investigate _____.
A.
Because they did not believe that pumas existed in England
B.
Because they wanted a puma for the London Zoo
C.
When a woman saw a puma in a small village
D.
Because people's description of the puma had a lot in common
【简答题】下图的曲线C 1 、C 2 、C 3 、C 4 是指数函数y=a x 的图象，而a∈{ ， ， ，π}，则图象C 1 、C 2 、C 3 、C 4 对应的函数的底数依次是（ ）、（ ）、（ ）、（ ）。
【单选题】Experts eventually decided to investigate
A.
because they did not believe that pumas existed in England
B.
because they wanted a puma for the London Zoo
C.
when a woman saw a puma in a small village
D.
because people's descriptions or tne puma had a lot in common
【单选题】小明用3％的可溶性淀粉溶液为底物，探究温度对唾液淀粉酶活性的影响。他设置了4组实验（除温度外其他条件均相同），待反应一段时间后取出试管，室温放置30分钟，加适量碘液，显色结果见下表（“+”越多，表示蓝色越深）。 根据实验结果，可知（）
A.
蓝色越深，唾液淀粉酶活性越高
B.
唾液淀粉酶活性在40℃比50℃高
C.
温度越高，唾液淀粉酶活性越高
D.
温度对唾液淀粉酶活性没有影响
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