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【单选题】
自我保护原则是( )原则的一种内涵延伸。A.
合法性原则
B.
规范性原则
C.
综合性原则
D.
稳健性原则
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举一反三
【简答题】II. Classic reading(中华诗词诵读)
【单选题】The Natural Approach believes that the teaching of ______ should be delayed until comprehension skills are established.
A.
listening
B.
speaking
C.
reading
D.
writing
【多选题】用图解法设计如图所示的铰链四杆机构。已知其摇杆CD的长度lCD=75 mm，行程速度变化系数K=1.5，机架AD的长度lAD=100 mm，又知摇杆的一个极限位置与机架间的夹角φ=45°,求其曲柄的长度lAB和连杆的长度lBC（ ）【图片】
A.
l AB = 49 mm, l BC =120 mm
B.
l AB = 59 mm, l BC =1 2 0 mm
C.
l AB = 21 mm, l BC = 5 0 mm
D.
l AB = 21 mm, l BC = 60 mm
【简答题】图示铰链四杆机构,已知b/a=1.5 ,c/a=1.2,为使此机构为双曲柄机构,试分析确定d/a 的取值范围。
【简答题】How to Be Effective Readers I. Introduction of reading and how to be effective readers A. Introduction of reading i. A method of absorbing 1.______ a. Comprehension b . Reading speed ii. Factors influ...
【单选题】II. Choose the correct answers after reading the passage. 1. What did the group do first in the morning? They .
A.
went into the forest slowly
B.
left the chimp family sleeping in a tree
C.
observed the family of chimps wake up
D.
helped people understand the behaviour the chimps
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