问题
单项选择题 B1型题
木本植物茎的保护组织通常是（）
A.后生皮层
B.周皮
C.后生表皮
D.表皮
E.黏液层
答案
参考答案：B
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木本植物茎的保护组织通常是（）
A.后生皮层
B.周皮
C.后生表皮
D.表皮
E.黏液层
参考答案：B
American people have the habit of saying “Thank you”when something kind is done for them or something polite is said to them, no matter how easy the thing is. This habit is learned by people of many countries. You should say “Thank you”when someone you the salt on the table, when someone walks aside to let you in a corridor （走廊）, when someone ahead of you keeps the door open you, when someone says your work is well or you have bought a nice thing, or your city is very beautiful. “Thank you”is not only between strangers or new friends, but also between old friends, parents and children, brothers and sisters, husbands and wives. Parents often tell children that they should say “Thank you”in answer to a kind word or act when they are only four five years old. Perhaps that’s almost everyone has got this habit.
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