镁碳砖炉衬的侵蚀过程是“（）—（）—（）”循环进行的。

《宋史·食货志》载“宋自削平诸国,天下盐利皆归县官,官府通商,随州郡所宜,然亦变革不常,而尤重私贩盐之禁”。 这段话反映的核心问题是

A．宋代地方政府权力较前代增大

B．国家重治贩卖私盐

C．盐业官营,实行垄断经营

D．宋代实行重农抑商政策

C

A young woman carrying a three-year-old child got on a bus. The conductor(售票员) hurried to give her a warm welcome and then kindly asked the other passengers to make more room for the woman and her child. On seeing this, people began to talk. "You know this conductor used to be very rude. Now suddenly he has changed his bad behavior , "said a middle-aged man.

"Yes, he should be praised and we must write a letter to the company," said a second passenger. "That's right," another lady said, "I wish a newspaper reporter were here so that more people could learn from this conductor. "

Just then a gentleman who looked like a teacher turned to the conductor and said , "Excuse me, but can I know your name, please? Your excellent service must be praised..."

Before he could open his mouth, the three-year-old child sitting on the young woman's lap interrupted, "I know his name. I call him Dad."

46. The passengers were ________ to see the conductor's kindness to the woman and the child.

A. excited       B. unpleased      C. interested     D. surprised

47. One passenger suggested writing a letter to the company to ______.

A. make a demand for more buses

B. thank the conductor for his good service

C. criticize the conductor for his rude behavior

D. invite a newspaper reporter to write about the conductor

48. What was the gentleman?

A. A teacher.                      B. A newspaper reporter.

C. Not known from the story.         D. The conductor's friend from his company.

49. The word "he" in the last paragraph refers to _______.

A. the gentleman                 B. the conductor

C. the middle-aged man           D. the three-year-old child

50. It is clear from the story that the conductor _______.

A. has changed his attitude towards his work

B. has now been kind and polite to all passengers

C. has not changed his rude behavior to passengers probably

D. has now been kind and polite to women with children

牛膝与川牛膝均有的功效有

A．逐瘀

B．通经

C．利尿通淋

D．引血下行

E．补肝肾强筋骨

幼儿社会化

以下因素与夯点的夯击次数无关的是( )。

A．夯坑的夯沉量

B．夯坑侧壁的隆起量

C．孔隙水压力

D．两遍夯的间隔时间