前、后桅灯的垂向距离至少为()。A.2m B.3m C.5m D.6m

题型:单项选择题

问题:

前、后桅灯的垂向距离至少为()。

A.2m

B.3m

C.5m

D.6m

考点:海船船员考试船舶操纵与避碰知识船舶操纵与避碰知识题库
题型:单项选择题

根据首字母及文章大意完成下列短文

                                                             PEN PAL WANTED

     My (1)n__________ is Lei Tao, and my English name is Jack. I'm (2)__________

China. I (3)l__________ in Beijing, I (4)s__________ Chinese, I like sports very much.

(5)O__________ weekends,I go to play with my friends. Volleyball and football  are my

favorite (6)s__________. I (7)l__________ English class at school, because my English

teacher is very fun. I like math (8)t__________. My favorite (9)m__________ are action

movies and comedies. Jack Chan is my favorite actor. Please write and (10)t__________

me about yourself'.

题型:单项选择题

合金刃具钢一般是()。

A.低碳钢

B.中碳钢

C.高碳钢

D.高合金钢

题型:单项选择题

热水采暖系统局部散热器不热的判别方法是用手摸两边管线温度,发现是否有明显的温差,确定位置后分析原因,并制定排除方案。

题型:单项选择题

流脑主要经( )

A.飞沫传播
B.水、食物、苍蝇传播
C.吸血节肢动物传播
D.血液、体液、血液制品传播
E.土壤传播

题型:单项选择题

已经掌握了“动物”这一概念,再学习“马”这一概念,属于

A.上位学习

B.下位学习

C.整合学习

D.并列结合学习

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