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【单选题】
Z2~40.正弦交流电压的有效值是10V,角频率是ω,初相位是-30°,该电压的解析式是( )V。A.
u=10sin(ωt+30°)
B.
u=10√2sin(ωt-30°)
C.
u=5√2sin(ωt+30°)
D.
u=10√2sin(ωt+30°)
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【单选题】a, lies, cat, chair, the, white, under Put the words in a right order to form a sentence.
A.
The chair under lies a white cat
B.
A cat lie under a white chair.
C.
Under the chair lies a white cat.
D.
Under the white cat lies a chair
【简答题】Saul Bellow's first novel __________________ is an existential study of man’s inability to make his choice in life.
【单选题】不正确的赋值或赋初值的方式是 ( )。
A.
．char str[6]＝{‘\0’}；
B.
char str[7] ＝ “string”；
C.
char str[10] ；str＝“string”；
D.
char str[6] ＝“g”
【单选题】a, lies, cat, chair, the, white, under Put the words in a right order to form a sentence.
A.
The chair under lies a white cat
B.
A cat lies under a white chair.
C.
Under the chair lies a white cat.
D.
Under the white cat lies a chair
【单选题】Under no circumstance()to tell lies to the public.
A.
the companies are allowed
B.
are the companies allowed
C.
the companies will allow
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