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设计专题训练3立方体生活空间概念设计草图2
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【简答题】As called ______ in our L/C, please mark all drums conspicuously ______ the shipping mark" × × ×" and the word "POISONOUS".
【单选题】As called for in our L/C, please mark all drums ______ with the shipping mark" × × ×" and the word "POISONOUS".
A.
conspicuous
B.
curious
C.
conspicuously
D.
curiously
【简答题】A 555 timer is configured to run as an astable multivibrator as shown in Figure 7–91. Determine its frequency.
【判断题】The 555 timer has three basic operating modes: monostable, bistable, and astable.
A.
正确
B.
错误
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