薄荷的横切面特征为() A.维管束8~10个;形成层环类圆形;有少数环髓纤维 B.维

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问题:

薄荷的横切面特征为()

A.维管束8~10个;形成层环类圆形;有少数环髓纤维

B.维管束12~15个;形成层环类三角形;环髓纤维较多

C.维管束8~10个;形成层环类圆形;无环髓纤维

D.形成层成环(方形);木质部在四棱角处发达;髓部中心常呈空洞

考点:中药从业人员知识竞赛中药鉴定学中药鉴定学题库
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已知等腰三角形的一边等于4,一边等于6,则它的周长为( )

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根据对话内容,用方框内所给的句子补全对话, 其中有两项是多余的。(5分)
A: Good morning, Li Fei. I want to write a story.
B: 小题1:_______________
A: A Chinese girl. Thanks to Project Hope, she finished her art dream.
B: Please tell me your main writing idea.
A: OK. 小题2: _______________Her parents died in a car accident. And she had to drop out of school.
B: What’s next?
A: Next? The girl’s art teacher found her talent on art, so she wanted to help the girl.
B: 小题3: ________________
A: She reported the girl’s story to Project Hope. She also raised some money for the girl.
B: Then, How was the end of the story?
A: With the help of Project Hope, the girl finished her education. 小题4: ________________
B: That sounds wonderful! When are you going to start the story?
A: This weekend. 小题5: ________________
B: Wow! You’re great! After all, you aren’t Chinese.
A: Thank you! My Chinese is very good!
A. What did the kind teacher do?
B. What is the story about?
C. And I will write it in Chinese.
D. She was a fan of pop.
E. First, I will describe the poor girl.
F. She returned to her hometown and taught the children art.
G. No one knows what will happen in the end.
 
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读“中国及周边地区略图”,回答下列问题。(10分)

(1)在图中适当位置填写出:西藏自治区

(2)图中,字母A是________(国家)。

(3)图中,甲是______________(山脉),乙是______________(山脉)。

(4)图中,北回归线共穿过了________个省区,其中位置最东的是________。

(5)写出我国领土四至点的位置。

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关于地震勘探井中爆破方式的说法中错误的是()。

A、采用井中爆破方式即使选择适当激发岩性,也不能有效压制各种干扰波

B、井中爆破方式是应用最广泛的爆破方式

C、井中爆破方式比较安全

D、可以有效地压制各种干扰波,获得理想的地震记录资料

题型:单项选择题

氯气小量泄漏的隔离距离是()。

A、50m

B、60m

C、70m

D、80m

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