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【简答题】
两根同种材料电阻丝,长度之比4∶1,横截面积之比2∶3,它们的电阻之比为____。
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举一反三
【单选题】The boss asked h er to ________ of the office for a few days while he was away. A. take in charge B. tak e charge C. take on charge D. get charge
A.
take in charge
B.
take charge
C.
take on charge
D.
get charge
【单选题】The baby is _____ Mary. [ ]
A.
in charge of
B.
in the charge of
C.
in charge of
D.
under charge of
【单选题】Who is ___ the school?
A.
in the charge of
B.
in charge of
C.
on charge of
D.
in charge of
【单选题】将字符串"I'm No.1"中全部字母转换为大写字母的字符串方法是( )
A.
"I'm No.1".swapcase()
B.
"I'm No.1".capitalize()
C.
"I'm No.1".title()
D.
"I'm No.1".upper()
【单选题】He the company for five years. [ ]
A.
is in charge of
B.
is in the charge of
C.
has been in charge of
D.
has been in the charge of
【单选题】He is ________ this company.
A.
in charge of
B.
in the charge of
C.
under the charge of
【单选题】启动 Windows 资源管理器后,在文件夹树窗口中,关于文件夹前的“ + ”和“ - ”,说法正确的是 ______ 。
A.
“+”表明该文件夹中有子文件夹，“-”表明该文件夹中没有子文
B.
“+”表明在文件夹中建立子文件夹
C.
“-”表明可删除文件夹中的子文件夹
D.
文件夹前没有“+”和“-”，表明该文件夹中没有子文件夹
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