问题 选择题
对于在空气中传播的电磁波,下列说法正确的是(  )

A.频率越低,波速越大

B.频率越低,波长越长

C.波长越长,波速越大

D.电磁波的波长都相等

答案

答案:B

完形填空
把下列单词填入每个句子的空白处(注意所填单词的形式变化):
journal  fare  transport  cycle  persuade  stubborn  insist  properly  determine  altitude  attitude  shorts  camp   record   topic   familiar   brave   plain 
1 I live near our school. Sometimes I _________ to school.
2 I ________ that the rude shop assistant should apologize to me.
3 My daughter is so ________ that she cannot easily change her mind.
4 You only have to pay 20 yuan; children travel at half _________.
5 I signed up for the 2007 English Summer _________.
6 The notice is written in German. Is anyone _________ with the German language?
7 The boy was ________ enough to keep chasing after the thief with a knife.
8 Liu Xiang broke the world _________ for the men’s 110-meter hurdle.
9 If you get to Beijing, there are two kinds of ________ for you to choose—by air or train.
10 When you write it is important to use words _________.
11 Fighting against terrorism(恐怖主义) has become an important ______ throughout the world these years.
12 Can you think of ways to _________ him to give up the plan?
13 When people are travelling they often write about their travels, which is called travel _______.
14 The Everest has an ________ of 8844.34 meters, according to the latest survey.
15 After putting on a T-shirt and ________, he went out to play tennis.
16 If you want to pass the exams, you’d better change your ________ towards them.
17 The soil of the Northeast _______ is fertile(肥沃的) and fine corn, sorghum, and rice grow there.
18 Upbringing(培养) plays an important part in _________ a person’s character.
问答题 简答题