问题 单项选择题 B型题

胃黏膜黏液细胞可分泌 ()

A.盐酸

B.胃蛋白酶原

C.胃蛋白酶

D.碱性黏液

E.生长抑素

答案

参考答案:D

解析:1.主细胞可分泌胃蛋白酶原,在酸性环境中转化为具有活性的胃蛋白酶。2.壁细胞可分泌盐酸和内因子。盐酸能使胃蛋白酶原被激活而成为胃蛋白酶,后者可使蛋白质变性易于水解。3.黏液细胞主要分泌碱性黏液,可形成黏液膜以保护胃黏膜,免受胃酸的侵蚀。

单项选择题

C

When something goes wrong, it can be very satisfying to say," Well, it’s so-and-so’s fault. "or "I know I’m late, but it’s not my fault ; the car broke down. "It is probably not your fault, but once you form the habit of blaming somebody or something else for a bad situation, you are a loser. You have no power and could do nothing that helps change the situation. However, you can have great power over what happens to you if you stop focusing on whom to blame and start focusing on how to remedy the situation. This is the winner’s key to success.

Winners are great at overcoming problems. For example, if you were late because your car broke down, maybe you need to have your car examined more regularly. Or, you might start to carry along with you the useful phone numbers, so you could call for help when in need. For another ex-ample, if your colleague causes you problems on the job for lack of responsibility or ability, find ways of dealing with his irresponsibility or inability rather than simply blame the person. Ask to work with a different person, or don’t rely on the person. You should accept that the person. Ask to work with a different person, or don’t rely on this person. You should accept that the person is not reliable and find creative ways to work successfully regardless of how your colleague fails to do his job well.

This is what being a winner is all about—creatively using your skills and talents so that you are successful no matter what happens. Winners don’t have fewer problems in their lives ; they have just as many difficult situations to face as anybody else. They are just better at seeing those problems as challenges and opportunities to develop their own talents. So, stop focusing on "whose fault it is". Once you are confident about your power over bad situations, problems are just stepping stones for success.

According to the passage, winners()

A. deal with problems rather than blame others

B. meet with fewer difficulties in their lives

C. have responsible and able colleagues

D. blame themselves rather than others

单项选择题