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【单选题】
A.A fish could survive being frozen.B.The fish were easier to catch in winter.#A.
A fish could survive being frozen.
B.
The fish were easier to catch in winter.
C.
Food could be kept frozen permanently.
D.
Quick freezing could prevent large crystals.
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举一反三
【单选题】业主委员会的性质是( )。
A.
业主委员会是业主大会的执行机构
B.
业主委员会是业主大会的决策机构
C.
业主委员会是代表和维护业主在物业管理活动中的合法权益,决定物业重大管理事项的业主自治管理组织
D.
业主委员会由物业管理区域内全体业主组成
【单选题】查询xs数据表中的所有数据,并按学号降序排列,语法格式是( )
A.
select * from xs group by 学号desc；
B.
select * from xs order by 学号 asc
C.
select * from xs order by 学号 desc；
D.
select * from xs 学号 order by；
【单选题】有关食管癌下列哪项是正确的（）
A.
上段食管癌多见
B.
溃疡型食管癌可引起早期梗阻
C.
血行转移多见
D.
中段食管癌的切除率不高
E.
食管镜对中、晚期病例确诊率可达100%
【判断题】一个文本控制台或仿真终端在同一时刻只能运行一个程序或命令,在未执行结束前,一般不能进行其他操作,此时可将程序在后台运行,以释放控制台或终端,使其仍能进行其他操作。要使程序以后台方式运行,只需在要执行的命令后加一个“$”即可。
A.
正确
B.
错误
【单选题】A professor of biology gave a talk to more than 1000 students on elephants living conditions and the dangers _______ them.
A.
face
B.
facing
C.
faced
D.
are facing
【单选题】The professor told him not to talk in class. He ________________ by the professor not to talk in class.
A.
has been told
B.
was told
C.
was being told
【单选题】In orderto take a message effectively, which of the followings is NOT correct?
A.
W rite clearly and legibly
B.
W rite down important information,
C.
C orrect spelling
D.
Call him/her back
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