青霉素抗菌作用的机制是(). A.干扰菌细胞壁的合成  B.干扰菌细胞蛋白质的合成

题型:单项选择题 A1型题

问题:

青霉素抗菌作用的机制是().

A.干扰菌细胞壁的合成 

B.干扰菌细胞蛋白质的合成 

C.破坏菌细胞膜通透性 

D.破坏菌细胞核酸的代谢 

E.干扰细菌细胞器的合成

考点:临床执业医师临床执业医师
题型:单项选择题 A1型题

下面是生活中的几条小建议,有5处需要添加小标题。请从以下选项(A、B、C、D、E和F)中选出符合各条建议的小标题。选项中有一项是多余选项。

小题1: You can try your hardest, you can do everything and say everything, but sometimes people just aren’t worth trying over anymore, and they aren’t worth worrying about. It’s important to know when to let go of someone who only brings you down. The moment someone tells you that you’re not good enough is the moment you know you’re better off than they are, and better off without them.

小题2:Remember that the way you’ve always done it isn’t the only way. It’s unlikely that one of the things you’ll regret when you’re 70 is not having consumed enough beer in your 20s, or not having bought enough $6 lattes from Starbucks, or not having frequented the same night club for years. But the regret of missing out on opportunities is a real feeling. You’ve figured out drinking and going out. You’ve had enough lattes. It’s time to figure something else out. Every corner you turn or street you walk down has a new experience waiting for you. You just have to see the opportunity and be adventurous enough to run with it.

小题3:Some of the great moments in your life won’t necessarily be the things you do; they’ll be things that happen to you. That doesn’t mean you can’t take action to affect the outcome of your life. You have to take action, and you will. But don’t forget that on any day, you can step out the front door and your whole life can change in an instant – for better or worse. To an extent, the universe has a plan that’s always in motion. A butterfly flaps its wings and it starts to rain – it’s a scary thought, but it’s part of life’s cycle. All these little parts of the machine, constantly working – sometimes forcing you to struggle, and sometimes making sure you end up exactly in the right place at the right time.

小题4:Life is too short to wait. Every new day is another chance to change your life. Every great accomplishment starts with the decision to try. Trust that little voice inside your head that says, “What if…” and then GO DO IT. You would be surprised how often “what if” works. And no, you’re not obligated to win every time. You’re obligated to keep trying – to do the best you can do every day – to be better than you were yesterday.

小题5: Your ideas and choices don’t have to be on everyone’s list. Regardless of the opinions of others, at the end of the day the only reflection staring back at you in the mirror is your own. Make sure you’re proud of who that person is. Approach others with the belief that you’re a good person, whether they respond positively or not. It’s normal to want the people around you to like you, but it becomes a self-imposed burden when too much of your behavior is designed to constantly comfort others.

A.Always keep in mind that life is somewhat unpredictable.

B.Trust your instincts on new opportunities.

C.Introduce a little variety into your routine.

D.Accept some responsibility for the way others treat you.E. Seek less approval from others. 

F. Let the wrong people go. 

题型:单项选择题 A1型题

已知:(1)醇类物质在催化剂存在条件下可发生类似于乙醇的脱氢氧化。(2)羰基()与两个烃基相连构成的化合物叫酮(如丙酮) ;而分别与烃基和氢相连构成的化合物叫醛(如乙醛CH3CHO)。下列醇被氧化时,不可能得到醛类化合物的是 [ ]

A.(CH3)2CHOH

B.(CH3)2CHCH2OH

C.CH3CH2CH2OH

D.(CH3)3CCH2OH

题型:单项选择题 A1型题

入炉料粉末降低1%,高炉利用系数提高(),焦比降低0.5%。

A、0.2-0.4%

B、0.4-1.0%

C、2%D、3%

题型:单项选择题 A1型题

Internet防火墙一般由以下两部分组成;分组过滤路由器与 【18】

题型:单项选择题 A1型题

中国资产评估协会成立于(  )。

A.1992年

B.1993年

C.1994年

D.1995年

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