下列做法易使金属被腐蚀的是

【名词&注释】

中位数(median)、中国古代(ancient china)、传播速度(propagation velocity)、一般现在时(simple present tense)、文化名人(cultural celebrities)、英国人(drakeford)、前三名(first three places)、自行车钢圈、一般将来时(simple future tense)

[单选题]下列做法易使金属被腐蚀的是

A. 用过的菜刀擦干
B. 铝锅盛放酸菜
C. 铁护栏涂上油漆
D. 自行车钢圈镀铬

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学习资料：

[单选题]Don’t discuss the problems with your partner unless you??____________ to do so.

A. ask
B. are asked
C. will ask
D. will be asked

[多选题]关于声现象下列说法正确的是 【 】

A. 真空不能传声是通过实验与推理的方法获得的
B. 发出较强声音的喇叭能使它前面的烛焰“跳舞”，说明声波能传递能量
C. 课堂上听到老师的讲话声,说明声音可以在空气中传播
D. 声音在不同介质中传播速度相同

[单选题]根据文意，下列理解错误的一项是（3分）

A. 桂花和梅、菊、兰、莲、牡丹等都是中国名花。
B. 科举前三名^{(first three places)}的代称和蟾宫折桂的典故有关。
C. 燕、韩两国用桂花表示亲善友好之情。
D. 中国古代的文化名人都非常喜爱种植桂花。

[单选题]有一组数据：10，30，50，50，70．它们的中位数是

A. 30
B. 45
C. 50
D. 70

[单选题]28． Tom went into a restaurant to _______ ．

A. buy glasses
B. have lunch
C. buy some books
D. sell glasses

[单选题]BJack is a famous writer now．But he said he was not a good student when he was young．He was often late for class and didn’t like doing his homework． Sometimes he slept in class while the teacher was teaching．He didn't understand much, but he always thought he under-stood everything．．

A. John is fifteen now and how old is his brother?" Jack answered, "That's easy． His brother is twice as old as John, so he is now thirty． "
B. see our eyes are in front of our ears?"
C. The third time, the teacher in a biology class asked, "Why can fish swim in the water?" "But, Miss White," said Jack quickly, "don't you know fish can-t walk on land?"
D. Jack was not ________． when he was young．
E. strong
F. lazy
G. clever
H. well

[单选题]6．Eventhoughit tomorrow，l _______there．

A. rains ; go
B. will rain ; go
C. rains ; will go
D. will rain; will go

[单选题]29． Mr Smith is _________．．

A. an Englishman
B. a Englishman
C. Li Qin's teacher
D. Chinese

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