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【单选题】
是当轿厢运行超过端站时，轿厢或对重装置未接触缓冲器之前，强迫切断主电源或控制电源的非自动复位安全装置。()A.
开关
B.
断绳开关
C.
极限开关
D.
限位开关
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【简答题】用be的正确形式填空。 1. There _________ a piano against the wall. 2. There _________ some flowers on the desk. 3. There _________ some tea in the cup. 4. There _________ two tins of coke in the bag. 5. There _...
【简答题】听录音，在每组句子中选出一个你所听到的句子。 ( )1. A. I can see a map on the wall. ( )2. A .Do you like Chinese tea? ( )3. A. What food do you like? ( )4. A. The best time to come to China is in spring. ( ...
【单选题】This is our classroom. It's a big room. There are some pictures on the wall. I sit under the window. Kate sits behind me. I'm in Row 2. She is in ROW 3. There are forty small desks and chairs in the r...
A.
True
B.
False
【单选题】某程序段内存在条件P，当P为真时执行A模块，否则执行B模块。该程序片段是结构化程序设计三种基本结构中的____。
A.
连续结构
B.
选择结构
C.
循环结构
D.
顺序结构
【简答题】15 ( ) 1 He put up a map ___ the back wall because there was a hole ___ it. A. on; on B. at; in C. on; in D. on; at ( ) 2 There is a door___ the wall. "t a ^nc A. on B. to C. of D.in ( ) 3 This kind o...
【单选题】听力原文：(A) The houses are built with a same design. (B) The man is leaning on the wall. (C) The workers are installing an antenna on the roof. (D) There are no windows in the houses.
A.
B.
C.
【简答题】结构化程序设计的三种基本程序结构为顺序结构、 和选择结构。
【简答题】结构化程序设计的三种基本结构为顺序结构、选择结构和（ ）
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