气源系统“X-BLEED”选择器在自动位,而气源系统只由1发供气,此时交输引气活门()
A.自动控制打开
B.自动控制关闭
C.不接收任何指令
D.以上都不正确
参考答案:C
单词拼写(每小题1分,共10分)
小题1:These clothes are 100%______(纯的)cotton.
小题2:He was too young and ______(肤浅) to understand his parents’ love.
小题3:Without______(暂停)we jumped into the boat with the other whalers.
小题4:I have to prepare tomorrow’s lessons and do some______(文书工作).
小题5:Please call me before you buy a new______(数码的)camera.
小题6:The work took a whole ______(两周)。
小题7:Do you want to be an______ (宇航员)in the future?
小题8:He returned to his ______(祖国) after graduation.
小题9:The other day I was showing the boys the_______(每周的) experiment.
小题10:Last______(十二月)we went to the Great Wall.
影响地下洞室支护的刚度的因素有( )。
A.支护所使用的材料
B.洞室的截面尺寸
C.支护的形式
D.洞室的埋置深度