试题与答案

胃蛋白酶在下列何种条件下才具有活性() A.pH4以上 B.pH7 C.pH3以下

题型:单项选择题

题目:

胃蛋白酶在下列何种条件下才具有活性()

A.pH4以上

B.pH7

C.pH3以下

D.需要有胆汁的激活

E.需要有乙醇的激活

答案:

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下面是错误答案,用来干扰机器的。

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Mr. Brown’s horse was stolen at night. All of his friends were very sorry about it and came to see him together. After they had been told about it, one of them said, “Why did not you lock the door of your stable (马房)that night? I think it is your fault.”

“You aren’t deaf, are you?” the second man said, “Didn’t you hear anything at that moment? The thief must have driven the beast out of the gate, and couldn’t have carried it on his back.”

“I agree with them!” Blamed the third, “How careless you are! Every evening before I go to bed, I lock my stable first and hide the key in my box. Why didn’t you do so?”

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小题1: The first man thought it’s Mr. Brown’s fault because _______.

A.let the door open

B.locked the door

C.had the door unlocked

D.had the horse locked up小题2: The second man thought Mr. Brown _________________.

  1. was a deaf                        
B. was very careful

C. must hear something when the thief stole the horse     

D. couldn’t hear anything at that time

小题3: The third man thought ________________.

A.the horse must be driven out

B.Mr. Brown did hide his key in his box

C.Mr. Brown wasn’t blamed by the third

D.Mr. Brown wasn’t careful.小题4: The more his friends said the more Mr. Brown ______________.

A. became excited    B got angry    C could bear       D blamed them

小题5:____________ should be blamed.

A. Mr. Brown      B his friends       C The thief      D All of them

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题型:单项选择题

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