问题 单项选择题

营养性巨幼红细胞性贫血用维生素Bl2治疗,正确的是

A.有神经系统症状时,维生素B12每日1吨剂量连续肌注,至少2周
B.对维生素Bl2治疗反应差或无明显神经系统症状者,可加用叶酸口服
C.单纯缺乏维生素B12时不宜加用叶酸治疗
D.用至临床症状明显好转、血象恢复正常
E.以上都是

答案

参考答案:E

单项选择题
阅读理解

Let’s say you have a piece of wood, a nail, and a hammer. Pretend the wood is a person, and the nail is a mean rumor(谣言) about that person. If you hammer in the nail, you’re obviously hurting him or her. If you then pull out the nail, there’s still a hole in the wood, and the damage has been done.

There are many reasons why that nail of a rumor can be so harmful. Rumors are, quite simply, a form of bullying(欺侮). When a person or a group makes up a rumor about someone or decides to spread gossip, it’s usually to hurt someone, break up a friendship, or make someone less popular. It’s the same thing as teasing, only it’s done behind someone’s back instead of to his or her face.

When you spread a rumor about someone, you’re sending a signal that the person is outside of the group, and somehow less worthy of friendship than others. You’re making fun of that person or pointing out negative things about him or her. This can let others think that it’s okay to make the person feel bad, and make him or her an outsider.

We need to be able to trust our friends, and gossip and rumors can break this trust. If you tell a personal secret to a friend, and he turns around and tells it to someone else, you might feel like you will get burned if you ever get close to him again.

Letting a rumor influence your behavior is like letting someone else make a big decision for you. Let’s say you hear that the teacher plans to call a Snow Day tomorrow because a blizzard (暴风雪) is coming. Expecting a day off, you don’t do your homework. The next morning, the blizzard turns out to be nothing more than a drizzle(毛毛雨), and school isn’t off after all. You get zeroes on your work.

小题1:To tell a rumor and a tease apart, you depend on ______.

A.whether it is done behind someone

B.whether it is painful or not

C.whether it is a kind of bullying

D.whether it is spread fast.小题2:If a rumor is spread about someone, others may_______.

A.point out his or her advantages

B.keep away from him or her

C.not feel he or she is an outsider

D.be hurt if getting close to him or her again.小题3:The purpose of this passage is to _______.

A.advise on how to deal with rumors

B.teach us how to judge a rumor

C.find out why rumors spread fast

D.explain why rumors hurt