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【简答题】
设计一个报警器控制程序,当行程开关条件X1=ON满足时蜂鸣器鸣叫,同时报警灯以每次亮2S、熄灭3S的周期连续闪烁10次后,自动停止声光报警。
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反馈参考答案：
举一反三
【单选题】With a large family of growing children to feed and clothe, my mother had difficulty in making
A.
th ________ meet.
B.
ends
C.
sides
D.
parts
E.
ways
【单选题】New Foods and the New World In the last 500 years, nothing about people — not their clothes, ideas, or languages — has changed as much as what they eat. The original chocolate drink was made from the ...
A.
Food
B.
Clothing
C.
Ideology
D.
Language
【简答题】He has to work hard to feed and clothe his family.
【单选题】Jane always enjoys ______ to popular music at home on Friday evening.
A.
listening
B.
to listen
C.
being listening
D.
to be listening
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