【简答题】What certificates has the writer obtained? He has obtained______.
【简答题】采用预铺移设法成组更换单开道岔时,道岔的组装的方法和步骤?
【简答题】成组更换和铺设道岔有几种办法及适合在什么条件下使用?
【简答题】According to the writer, the world has become ______ .
【单选题】成组更换道岔和岔枕时,应()更换为新道砟。
【单选题】According to the text, what is not the attitude of the Writer?
A.
The writer has changed the prejudiced opinion on sunscreen cream.
B.
The writer advises people to use sunscreen cream regularly.
C.
The writer persuades the people to put the sunscreen to everyday use.
D.
The writer is supporting the new findings on sunscreen cream.
【单选题】225GXGZ.成组更换道岔或岔枕应(..)防护。