【单选题】【消耗次数：1】
There were dirty marks on her trousers ___ she had wiped her hands.
①
where
②
which
③
when
④
that
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相关题目
【单选题】
She resorted to ____ when she had no money to buy foods for her children.
①
have stolen
②
steal
③
stole
④
stealing
【单选题】
She resorted to _____ when she had no money to buy foods for her children.
①
have stolen
②
steal
③
stole
④
stealing
【单选题】
She got married although her parents had not given her their ___.
①
allowance
②
consent
③
permit
④
appreciation
【单选题】
27.She did her work _________her manager had instructed.
①
as
②
until
③
when
④
though
【单选题】
It was not until she had finished all her work_____.
①
did she return
②
that she returned
③
when she returned
④
that did she return
【单选题】
When she was criticized, she claimed that it was outside her _____of responsibility.
①
field
②
limit
③
extent
④
range
【单选题】
It was not until she had arrived home __________ remembered her appointment with the doctor.
①
when she
②
that she
③
and she
④
she
【单选题】
She realized that her youth and inexperience were being.
①
explored
②
exploited
③
explode
④
exported
【单选题】
Lindas parents died when she was a baby, and she was __________ by her aunt.
①
turned into
②
raised up
③
grown up
④
brought up
随机题目
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/D851E1F97821B00CC1E4AAF34D9E7C1D.png" title="8.png" alt="8.png"/>
【单选题】
列管换热器中用饱和蒸汽加热空气，下面两项判断是否合理，甲：传热管的壁温接近加热蒸汽的温度；乙：换热器总传热系数K接近空气侧的对流给热膜系数,说的正确的是 。
①
(a)甲合理，乙不合理
②
(b)甲不合理，乙合理
③
（c）甲乙都合理
④
(d） 甲乙都不合理
【单选题】
用一离心泵将冷却水由贮水池送至高位槽。已知高位槽液面比贮水池液面高出10m，管路总长（包括局部阻力的当量长度在内）为400m，管内径为75mm，摩擦系数为0.03。该泵的特性曲线方程为H=18-600000Q^2，式中H的单位是m，Q的单位是m/s。试求：(1) 管路特性曲线方程；(2) 泵工作时的流量和扬程。
①
H=10+418250Q^2Q=0.0028m^3/sH=10m
②
H=10+418250Q^2Q=0.0028m^3/sH=13.29m
③
H=10+258900Q^2Q=0.0042m^3/sH=10m
④
H=10+258900Q^2Q=0.0042m^3/sH=13.29m
【单选题】
下列关于温度梯度的论断中错误的是————。
①
温度梯度决定于温度场中的温度分布
②
温度场中存在温度梯度就一定存在热量的传递
③
热量传递会引起温度梯度的变化
④
热量是沿温度梯度的方向传递的