【单选题】特殊材料的镜架整形时,必须(),K金架、钛材架在使用钳子校正时,应垫一块布,以防()
【多选题】温湿度控制与调节的方法很多,常用的主要有( )。
【单选题】According to the description in Paragraph 1, which of the following did the author NOT do at that time?
A.
Withstanding the coldness.
B.
Camping in the mountains.
C.
Getting up repeatedly at night.
D.
Reading Shakespeare in bed.
【简答题】在Red Flage Linux Server中,______命令可用于显示当前用户的工作目录。 A.cd B.md C.pwd D.Rd A. B. C. D.
【简答题】通过变频手段调节三相异步电动机转速时,频率越高,电机转速( )。A. 4
【单选题】通过变频手段调节三相异步电动机转速时,频率越高,电机转速( )。
【单选题】According to Paragraph 2, which of the following is NOT true of the perpetual studiers?
A.
They do not talk to anyone except to answer questions.
B.
They do well in school and maintain something of a social life.
C.
They study until very late at night, stopping only for a quick snack.
D.
Most of them never meet new people except roommates at the start of school.
【单选题】Which of the following is TRUE according to Paragraph 3?( )
A.
Americans do not understand broken English.
B.
The author's mother was not respected sometimes.
C.
The author'mother had positive influence on her.
D.
Broken English always reflects imperfect thoughts.