客运机车加装的平稳操纵装置B型切控阀属于（）压力构造，它根据_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

客运机车加装的平稳操纵装置B型切控阀属于（）压力构造，它根据制动管的压力变化同J2-7分配阀一起完成机车的制动，缓解和保压作用

A．二

B．三

C．四

答案

参考答案：B

单项选择题

( )是指在承包商与业主签订的合同中规定的完成全部合同工作的时间期限及非承包商责任引起的延长期限。

A．工期

B．合同工期

C．进度计划

D．施工工期

填空题

Column A: the main features of the Direct Method

①The students are encouraged to learn to think in the target language.
②The target language is used exclusively in the language classroom.
③Grammar is learned inductively.
④Oral communication skills are regarded as basic.
⑤The basic unit in a language is the sentence.

Column B: the advantage or disadvantage associated with the feature

a. Regarding listening and speaking as the basis of reading and writing is strategic in fostering the four skills.
b. Thinking in the target language is necessary in efficient real communication.
c. Learners lack a necessary knowledge of the target language grammar.
d. It is difficult to teach the meaning of abstract concepts.
e. Using full sentences as teaching units makes foreign language learning more natural and efficient.