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【单选题】
在 R 、 L 、 C 串联的单相交流电路中,当 XL 时, 则该负载呈 ( )A.
感性
B.
容性
C.
阻性
D.
无法确定
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】习题6.5 求下列函数的极值: (1)
【单选题】The air in big cities _____very dirty by factories.
A.
are often made
B.
is often made
C.
have often made
D.
has often made
【单选题】Do you know the student____________?
A.
whom I often talk
B.
with who I often talk
C.
I often talk with
D.
that I often talk
【单选题】Turn on the television or open a magazine and you ________ advertisements showing happy families. A. will often see B. often see C. are often seeing D. have often seen
A.
will often see
B.
often see
C.
are often seeing
D.
have often seen
【简答题】4函数的极值与最值练习题.docx
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