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【单选题】
在对用户的需求描述进行分析时,其中的动词可以映射为:A.
用例
B.
参与者
C.
端点
D.
实体
手机使用
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举一反三
【单选题】The policeman signed to a driver to ______ to check if he had drunk.
A.
pull over
B.
pull out
C.
pull in
D.
pull through
【单选题】对X线的描述,下列正确的是
A.
X线的硬度大——波长长——穿透力强
B.
X线的硬度大——频率高——穿透力弱
C.
X线的硬度大——波长长——穿透力弱
D.
X线的硬度大——HVL小——穿透力强
E.
X线的硬度大一频率高一穿透力强
【单选题】One rainy night the policeman had a chance to _____ with a gang of smugglers.
A.
acquaintance
B.
encounter
C.
account
D.
interview
【单选题】The policeman supposed .
A.
whether the victim had rung the doorbell
B.
he would come to get the money in the rubbish bin.
C.
when did the witness see the murder
D.
that how the man ran out of the dark house
【单选题】. They told the policeman the fact they had nothing to do with the murder.
A.
that
B.
which
C.
why
D.
how
【单选题】Words failed her when the _____ mother wanted to express her thanks to the policeman who had saved her son. [ ]
A.
upset
B.
grateful
C.
confident
D.
sensitive
【单选题】The policeman had to one month in training before being allowed to rejoin his unit.
A.
cost
B.
spend
C.
locate
D.
lift
【单选题】根据《生产过程危险和有害因素分类与代码》(GB/T 13861—1992)的规定，下列不属于化学性危险和有害因素的是( )。
A.
易燃易爆性物质
B.
腐蚀性物质
C.
有毒物质
D.
电磁辐射
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