A. Extreme temperature variances
B. Extreme humidity variances
C. Power stability fluctuations
D. Excessive dust accumulation
第1题:
A.similar
B.alike
C.same
D.likely
第2题:
第3题:
According to Skinner, language behavior can only be studied through observation of the()factors.
external
略
第4题:
A.Cause2
B.Cause4
C.Cause7
D.Cause15
第5题:
第6题:
下列标识符中,()是不合法的标识符。
A.123fan
B.Module
C.Fan_encoder
D.fan123